OBOŇA - Margita Kováčová, Veľkolehotská 1, 971 01 Prievidza (2000-03-27)
OBŠIVAN (Terchová) - Zaujímajú ma rody: Obšivan, Jánošík, Masnica, Hanuljak, Komačka, Martinusík, Poživenec, Jankov, Hanzel (všetky z Terchovej), Noga (Horná Tížina), Staňo, Greguš, Košut (všetky z Riečnice), Janíček, Šimun, Trizujlak, Cabadaj, Sedláček, Franek, Šutovský, Miček (všetky z Gbelian), Mrázik, Valášek, Majerčík, Bolo, Pinka, Podmanický (všetky z Tepličky nad Váhom), Žídek (Belá), Rolko (Mojš). Radoslav Obšivan, Na močiar 918/19, 013 01 Teplička nad Váhom, (2014-02-10)
OCSKAY (Liptov region, Dolný Kubín) - further names: Krčméry, Ocskay. Richard Brunson, 1460 Norfield Rd., Suamico, WI 54173-8441, USA, (2001-03-21)
OČENÁŠEK (Morava) - Skúmam rody Šamák (Bošáca), Uličný (Čachtice), Očenášek (Morava), Hornay (Trenčianska Teplá), Vavruš, Fero (Trenčianska Turná), Štefák (Trnava). Zuzana Šamáková, Železničná 607, 913 21 Trenčianska Turná, Mobil: 0908 034 579, (2007-02-26)
OČIPA (Veľký Šariš) - My father Štephan Ocipa (in the USA we are called Ochipa) was born in Veľký Šariš.  My mother Mary Gyorgyi came from Košice. (2000-05-22)
OČKAY - I am tracing families Krcmery, Dubravec, Ockay, Jancek, Janotik, Mastis, Benkovic; localities: Liptovská Teplá, Liptovský Ondrej, Ružomberok, Partizánska Ľupča, Dolný Kubín, Bratislava. Richard K. Brunson, 1460 Norfield Rd., Suamico, WI 54173-8441, phone: (920)434-3149, (2006-05-24)
OČKAY – Mapujem strom rodiny Očkay, zatiaľ od roku 1874. Jozef Očkay, , 0910 338 054 (2014-06-21)
OČOVSKÝ - Zaujímajú ma rody Bázlik, Ostrolúcky, Bakoš, Schwarz, Zamboj, Očovský, Štampaský z Pukanca, Bohuníc a Devičian. Mgr. Ľudmila Ponická, Ul. Ľ. Fullu 1988/16, 960 07 Zvolen, (2010-06-02)
OCHIPA (Veľký Šariš) - My father Štephan Ocipa (in the USA we are called Ochipa) was born in Veľký Šariš.  My mother Mary Gyorgyi came from Košice. (2000-05-22)
ODESCALCHI - Seeking ancestral Information on: Vileuosni Sébastiani de Porta et Remete-Pogonyest married Gisele Von Kraft their daughter: Angele Remetei es Poganjeszti Sebastiani married Prince Lorant Odescalchi Duke of Brocciano, Ceri and Szerem. Dan Beaudoin, (2002-12-30)
ODESCALCHI - My name is Heinrich Melus and I’m born in Austria. I’m 66 years old and look for possible relatives in the Solčany – Krnča area. It seems that I’m the last male Melus in Austria. I’m born in Austria and work for many years in Moscow and live also there. I come 3-4 times a year to Vienna, which I could use to go to Topoľcany country. I know very little about my roots, but… My father Michael MELUS was born 3.3.1896 in Solčany and died 1970 in Vienna. His parents: Jozef Melus born 1870 and his wife Maria Nikodem (Melus) born 1872 (?). Jozef Melus was the last child (12th) and the only boy in his family. My grandfather worked for the Odescalchi family as a hunter(?). He had serious trouble with one young Odescalchi in 1898. After a fight he took his wife and children and escaped to Vienna, where he lived till his dead, Februar 1943. I was a year ago in Solčany and Krnča, but know nobody there. I saw graves of Melus and Nikodem on both cemeteries. I look for relatives from my grandfathers/mother or from their parents, if existing. If German language is easier, I can write in the future. Heinrich Melus, (2009-04-28)
ODLER (Dechtice) - Zajímám se o rodokmen Odlerů z Dechtic. Jana Burešová, (2007-08-24)
ODLER (Dechtice) - Skúmam rody Cintula (Cabaj-Čápor, Borský Mikuláš, Nitra, Tekovská stolica - Dolný Štál, Tolnianska stolica - Földvár), Cagáň (Prievidza), Odler (Dechtice), Podmanický (Chynorany), Šovc (Bátovce). Juraj Cintula, Mochovská 14, 934 05 Levice, Tel.: 036-6227767, (2006-01-26)
ODLER - Róbert Odler, Dr. Bodického 28, 900 01 Modra
ODLER - Martin Odler, 038 42 Ležiachov (2001-01-25)
ODRY - Ladislav Odry, Hroncová 6, 040 01 Košice, (2013-03-04)
OGRYZLO - I am looking for information on John Ogryzlo, born 1895, that came to Canada with brother Alexander. (2004-01-08)
OKLEŠTĚK - Jiří Ošanec, I. P. Pavlova 26, 779 00 Olomouc, Czech Republic,
OKOLICSÁNYI - Manžel je priamym potomkom rodu Okolicsányi a rada by som dozvedela viac o tomto rode. Ingrid Okoličányová, (2008-03-13)
OKOLIČÁNY - Manžel je priamym potomkom rodu Okolicsányi a rada by som dozvedela viac o tomto rode. Ingrid Okoličányová, (2008-03-13)
OKOLIČÁNY - Skúmam rody Okoličány (Liptovský Mikuláš, Bratislava), Vladár (Martin, Bratislava) a Krupec (Turiec, Bratislava, atď.). Lucia Okoličányová, Nábr. gen. L. Svobodu 58, 811 02 Bratislava, Tel.: 0908 727 103, (2006-08-21)
OLÁH (Klenovec) - Zaujímam sa o rody Oláh, Radič /Klenovec/, Baniari, Šuriansky /Žarnovica, Nová Baňa, Horné Hámre, Župkov/. Július Oláh, Hálova 17, 851 01 Bratislava 5, tel.: 02-622 42 139, 0904 273 100, (2009-01-09)
OLASZ (Hanušovce nad Topľou) - I am interested in finding my ancestors from Hanušovce prior to 1853. They were Roman Catholic. 1. Joannes Urban, nobilis, miller, died Mar 3/ 1854 at age 65 years in Hanus Falu indicating that he was born in 1789 in Ormezo (Strazske). Husband of Elizabetha Petro married for 39 years,1 month and 27 days indicating that they were married 1815. Owned a mill near Hanus Falu. 2. Elizabetha Petro, died Oct 23/1859 at the age of 63 years 6 months and 4 days. Indicating that she was born in 1796 in Lipnik. Resident of Hanus Falu lot. #17. 3. 3. Joannes Urban nobilis alias Klobuszovszky. Son of Joannes Urban, nobilis & Elizabetha Petro. Died Nov. 19/1879 at the age of 63 indicating that he was born about 1816 in Palvagas (Pavlovce). He was a carpenter and married to Maria Varholy for 39 years. 4. Maria Varholy. Died Dec 31/1879 in Hanus Falu at the age of 60. Indicating that she was born in 1819. Since Ormezo/Strazske was founded by Royal Guards at the beginning of the 12th century a tradition of miller trade and wine making existed there. Siebmacher mentions a document from the 28th of August 1666 in Vienna Stefan Urban was ennobled. His wife’s name was Judith Olaszuva. Children’s named Stefan, Ondrej, Barbara, and Stefan’s brother was Juraj. He was ennobled by King Leopold 1st in Vienna. They were from Zemplin County. The family coat of arms pictured on a blue shield shows 3 vineyards on 3 hills with golden fruit. On the left is a gold star and on the right the sun with a face on it. In the background is an arm draped in red. Earl N. Bonovich, 3830 Gregory Dr., Northbrook, IL, 60062-7106 USA, (2007-02-19)
OLBERT -  My Grandmother and Grandfathers' families came from Czechoslovakia. My dad was the first one born in America. His mom's name was Mary Magdalena Benus. The village she came from was: Zakameni Klin. She died in the early 60's. My dad said there is a small catholic church in that area. My grandparents were married there in 1902 or 1904. My grandpa's last name was Olbertov the name was later changed to Olbert and when they came to America it became Albert. My dad says his father's family came from the northern part of Czechoslovakia. They had a very large farm that grew sugar beets and pears. My grandmother worked for my grandfathers family. As the story goes he left the farm married my grandmother and later came to America. Mary Ferris, 104 Wappoolah Dr., Summerville, S.C. USA, (2002-01-28)
OLBERTOV -  My Grandmother and Grandfathers' families came from Czechoslovakia. My dad was the first one born in America. His mom's name was Mary Magdalena Benus. The village she came from was: Zakameni Klin. She died in the early 60's. My dad said there is a small catholic church in that area. My grandparents were married there in 1902 or 1904. My grandpa's last name was Olbertov the name was later changed to Olbert and when they came to America it became Albert. My dad says his father's family came from the northern part of Czechoslovakia. They had a very large farm that grew sugar beets and pears. My grandmother worked for my grandfathers family. As the story goes he left the farm married my grandmother and later came to America. Mary Ferris, 104 Wappoolah Dr., Summerville, S.C. USA, (2002-01-28)
OLDENBURG - Mgr. Eva Geršiová, SNM-Slovanské múzeum A. Puškina, 958 42 Brodzany (2003-10-07)
OLEJNÍK - My grandparests came from Slovakia in the 1920's under the name Olejnik. Michael L. Olenick, (2003-01-14)
OLENICK - My grandparests came from Slovakia in the 1920's under the name Olejnik. Michael L. Olenick, (2003-01-14)
OLENIČ (Praha, Czech Republic;  Užhorod, Ukraine) - (1999-09-24)
OLERINY (Lučatín, Poniky) - My grandparents were Rudolf Oleriny and Ludmila Krajci Oleriny who lived in Bratislava. I believe they were married there November 20, 1920. Rudolf Oleriny, born: April 12, 1896 in Poniky, Lucatin (or Banska Bystrica), died: January 4, 1990 in Bratislava. Father of Rudolf: Jan Oleriny, born: February 7, 1869 in Poniky or Lucatin. Mother of Rudolf: Suzana (Zuzana) Mesko (Meskova), born: March 11, 1873 in Poniky. Ludmila Krajci - born: March 8, 1900 in Lucatin (or Poniky), died: July 5, 1983 (or May 7, 1983) in Bratislava. Father of Ludmila: Jan Krajci, born: April 13, 1863 in Lucatin (or Poniky). Mother of Ludmila: Cecilia Konder (Konderova), born: March 13, 1868 in Lucatin (or Poniky). The months and actual days may be off, but I believe the years are correct. I am also interested in the origin of the surname Oleriny; it is believed to have come from Italy or Greece, but no one knows for sure. Other spellings are Ollerini and Olleriny. Ana Oleriny, USA, (2004.04-01)
OLGYAI - Mám v dokumentoch po mojich prarodičoch zobrazený erb rodiny Olgyai. Rád by som sa dozvedel niečo viac o svojich predkoch. Andrej Jakubec, (2002-01-15)
OLIJAR (Stráňavy)-  Thomas J. Draus, P.O. Box 464, Hazel Green, WI 53811, USA (1999-09-09)
OLLERINI (Lučatín, Poniky) - My grandparents were Rudolf Oleriny and Ludmila Krajci Oleriny who lived in Bratislava. I believe they were married there November 20, 1920. Rudolf Oleriny, born: April 12, 1896 in Poniky, Lucatin (or Banska Bystrica), died: January 4, 1990 in Bratislava. Father of Rudolf: Jan Oleriny, born: February 7, 1869 in Poniky or Lucatin. Mother of Rudolf: Suzana (Zuzana) Mesko (Meskova), born: March 11, 1873 in Poniky. Ludmila Krajci - born: March 8, 1900 in Lucatin (or Poniky), died: July 5, 1983 (or May 7, 1983) in Bratislava. Father of Ludmila: Jan Krajci, born: April 13, 1863 in Lucatin (or Poniky). Mother of Ludmila: Cecilia Konder (Konderova), born: March 13, 1868 in Lucatin (or Poniky). The months and actual days may be off, but I believe the years are correct. I am also interested in the origin of the surname Oleriny; it is believed to have come from Italy or Greece, but no one knows for sure. Other spellings are Ollerini and Olleriny. Ana Oleriny, USA, (2004.04-01)
OLLERINY (Lučatín, Poniky) - My grandparents were Rudolf Oleriny and Ludmila Krajci Oleriny who lived in Bratislava. I believe they were married there November 20, 1920. Rudolf Oleriny, born: April 12, 1896 in Poniky, Lucatin (or Banska Bystrica), died: January 4, 1990 in Bratislava. Father of Rudolf: Jan Oleriny, born: February 7, 1869 in Poniky or Lucatin. Mother of Rudolf: Suzana (Zuzana) Mesko (Meskova), born: March 11, 1873 in Poniky. Ludmila Krajci - born: March 8, 1900 in Lucatin (or Poniky), died: July 5, 1983 (or May 7, 1983) in Bratislava. Father of Ludmila: Jan Krajci, born: April 13, 1863 in Lucatin (or Poniky). Mother of Ludmila: Cecilia Konder (Konderova), born: March 13, 1868 in Lucatin (or Poniky). The months and actual days may be off, but I believe the years are correct. I am also interested in the origin of the surname Oleriny; it is believed to have come from Italy or Greece, but no one knows for sure. Other spellings are Ollerini and Olleriny. Ana Oleriny, USA, (2004.04-01)
OLLÍK (Pukanec, Nová Baňa) - Ing. Milan Pálka, Budatínska 29, 851 05 Bratislava 5 (2002-06-28)
OMAN - Hľadám svojich predkov hlavne z maminej strany (Krommer, Krammer, Faix, Kilián, Oman). Krommer Arpád Ľudovít – narodil sa v Sládkovičove, SR, časť rodiny údajne vysťahovali do Maďarska, Holandska, Nemecka, v 1951 si vzal za manželku Paulínu Kilián, jej mama sa volala Ernestína Faix, vysťahovala sa s manželom do Maďarska, vlastnili dom s veľkým vinohradom v Buda Orsi, tam niekde by mali byť aj obaja pochovaní, dnes už čast Budapešti, sestra Ida Faix vlastnila nájomný dom v Bratislave, teraz je to budova pod menom u Koníčka na Mlynských nivách, pri znárodňovaní utiekla do Nemecka, neviem presne kam. Daša Krammerová, Malinovská 121, 900 28 Zálesie (Ivánka pri Nitre), Mobil: 0915 900 202, (2006-08-01)
OMASTA - Želmíra Omastová, Via Libarna 257/E, 15061 Arquata-Scrivia, Alessandria, Italy (2012-02-04)
OMASTA - Hledám svá předky a příbuzné jménem Omasta (Omazta). Naše rodina žije na jižní Moravě (Břeclav, Uherský Ostroh, Vyškov). Zajímám se i o rodinné erby. Miroslav Omasta, Kašíkova 6, 682 01 Vyškov, Czech Republic, ,www, www (1999-09-29)
OMASTA (Polomka) - My father’s name was Stefan Janovsky, he was born 8-25-87 in Polomka. My mother’s maiden name was Agnes Omasta, she was born in the same village June 6, 1903. They are both now buried in San Antonio, Texas. (2000-09-13)
OMAZTA - Hledám svá předky a příbuzné jménem Omasta (Omazta). Naše rodina žije na jižní Moravě (Břeclav, Uherský Ostroh, Vyškov). Zajímám se i o rodinné erby. Miroslav Omasta, Kašíkova 6, 682 01 Vyškov, Czech Republic, ,
www (1999-09-29)
OMILIAK (Orava, Poland) - Dávid Sulík, (2000-01-19)
ONDA (Smolník) - My great grand father was Andreas Onda and ggmother Maria. They had four children: Maria, Anna, Julia, and Janos (my grandfather). I believe they were from Smolnik. This is in reference to St. Marys Assumption Catholic Church (Byzantine Rite) in Whiting, Indiana USA. John W. Onda, (2002-05-13)
ONDEJKO (Závadka, d. Michalovce) - I am researching my grandfather’s family. His name was Paul Ondejko (married to Susan Sarek) who lived in the village of Zavatka, not far from the Ukraine border. His father John Ondejko (married to Mary Balie /Bala/, second wife) was mayor of Zavatka. Mark Paul Ondejko, (2000-03-01)
ONDER (Sobrance) - My grandfather John (Jan) Onder and my grandmother Anna Mirda emigrated to the US from the Sobrance District of Slovakia prior to World War One around 1910. I am trying to trace their roots. I may still have relatives in Sobrance that I would like to make contact with. Michael Patrick Onder, Burke, Virginia, USA, (2002-10-23)
ONDKOTZ - I am tracing ancestors from the town of Modra n/c. The surnames are Hancar, Hanscar, Ondkotz, Dzurak, Sztenko, Harvan, Szaloman, Gajdos, Jakub, Ihnat, Miko. Cheryl Hancar, (2006-02-10)
ONDRÁŠIK - Patram po menach Kaclik, Dugat, Ondrasik, Pecka, Puchovsky, Kern, Artz atd. Z jednej strany - na strednom Slovensku zrejme korene siahaju do nemeckej kolonizacie bani a na Povazi do druhej nemeckej polnohospodarskej kolonizacie. Predpokladam, ze meno Puchovsky pochadza od Puchova a Pecka z Moravy. Udaje mam uverejnene na www - zatial mam 465 osob. (2001-02-28)
ONDREJČEK - Mgr. Ján Hižnay, Ševčenkova 19, 851 01 Bratislava, (2001-03-30)
ONDREJOVIČ - Ing. Pavel Ondrejovič, 916 11 Bzince pod Javorinou 392 (2000-08-14)
ONDRIŠKOVIČ - Zaujímajú ma rody Stankovič, Ondriškovič a Patrnčiak. Ing. Helena Stankovičová, B. Tablica 89, 962 71 Dudince, (2006-11-20)
ONDRUS - I have more surnames to trace: Cupa, Figura, Hlavaty, Janacek, Kiripolsky, Krajcir, Lipar, Ondrus, Oravsky, Orsulak, Reszko, Rusnak, Runak, Vittek. John C. Orsulak, 208 E. Abbott St., Lansford, Pa 18232, USA, (2004-05-27)
ONDRUSKA - Zaujímam sa o rod Ondruškových, moji starí rodičia žijú pri Nitre. Stará mama bola rod. Janegová. Ja momentálne žijem tiež v Nitre.- I would like to know more about Ondruska family-members. My grandparents are living close to Nitra, Slovakia. My grannie´s maiden name was Janega. Her aunt lived in Penssylvania, USA. Now I´m living in my birth town Nitra. Jana Ondrušková, (2008-09-01)
ONDRUŠ (Liptovský Trnovec) - Zaujímajú ma rody Ondruš-Liptovský Trnovec, Trnovský a Scholtz-Liptovský Mikuláš, Országh-Turiec (Martin, Vrútky), Cuninka-Trnava a okolie. Prof. MUDr. Dalibor Ondruš, DrSc., Košická 58, 821 08 Bratislava, Tel.: 0905/144 579, (2010-04-28)
ONDRUŠ (Levoča) - Jaroslav Vokoun,  (2003-01-07)
ONDRUŠKA - Zaujímam sa o rod Ondruškových, moji starí rodičia žijú pri Nitre. Stará mama bola rod. Janegová. Ja momentálne žijem tiež v Nitre.- I would like to know more about Ondruska family-members. My grandparents are living close to Nitra, Slovakia. My grannie´s maiden name was Janega. Her aunt lived in Penssylvania, USA. Now I´m living in my birth town Nitra. Jana Ondrušková, (2008-09-01)
ONDURA (Košice-Kavečany) - Carol Pack Urban, Stahlstown, PA, USA,  www (2002-01-17)
ONDUŠ (Suchá Dolina) - My grandmother's name was Hovan and my grandfather's name was Ondus. These,
of course, may be Anglicized spellings.  I believe my grandmother was born in Suchá Dolina. Mary Bennardo, (2002-01-16)
ONUFRIK - Hľadám informácie o rodičoch alebo starých rodičoch Ivana Prochiru, narodeného okolo 1850, a o jeho manželke Anne rod. Onufrik, narodenej okolo 1852, ako aj o podobných priezviskách Prochira, Prohira, Prohyra, Prochera. I am interesting on surnames Prochyra, Prochira, Prohyra, Prohira or Prochera, because I would like find info about my great grand parents Ivan Prochira and his wife Anna bor. Onufrik born about 1850 in the area of East Slovakia, Poland or Ukraine (Galicia). Ľuboš Prochyra, Boskovičova 1194, 908 73 Veľké Leváre, Slovensko, (2006-12-05)
ONUSKA (Michalovce - Stráňany) - My granfather Paul Onuska came from Stráňany, his wife Anna Bijalko from Brezovica. Paul Onuska, (2000-08-22)
OPATT (Bánovce nad Bebravou) - Ancestors of Anton Bolech: Bolech, Hacsko, Korbel, Krizan, Kutny, Opatt. Anabeth Dollins, 1409 Terrace Drive, Pittsburgh, PA 15228-1608, USA, www, (2002-05-28)
OPICZ - My great grandfather Joseph Penkala was born in the Richvald area in 1862. His father Ignatz Penkala was married there and the church records mention that he was from a village called Visova. I haven’t been able to trace this village anywhere. My grand mother Anna Penkala was born in Sojanko(a), maybe Solyomko, now Soimeni in Romania and grew up in Haromhuta, now in Hungary. All the men in the family seem to have been glassblowers. The other family names I’m researching are Waldhauser (sometimes spelled with ‘V’), Barany and Opicz. From what I’ve been able to determine, these families knew each for a long time and moved to new villages together many times.  Louise M. Hamel, 2557 E Sylvia St., Tucson, AZ 85716, USA, (1999-10-05)
ORAVEC - Searching for: Oravec(z) in Vojčice (Vécse), Rakovec nad Ondavou (Rakócz), Veľké Ozorovce, Parchoviany, Zemplin County, as well as in the USA and worldwide. Surnames associated by marriage: Szeman, nikita, Nadzam, Hohos, Szemanyik, Csizsmar, Bujdos, Longinie and others. Also searching for Genyo in Mikovhas (probably Mikoháza, Hungary). Michael G. Oravecz, 1113 Dickens Ln, Naperville, IL 60563-4302, USA, , www (1999-07-13)
ORAVEC - Pátram predovšetkým po menách ako Kaclík, Faško, Dugát, Kern, Púchovský, Ondrášik, Pecka, prípadne Ličko, Kán, Baliak, Košecká, Oravcová. Moji predkovia žili v lokalitách: Piešťany, Filipovo, Brezno, Gašparovo, Braväcovo, Staré Hory ai. , www (2002-01-16)
ORAVEC (Dobšinská Maša) - My great grandfather, Maxillian Oravetz, (his last name was changed by Immigration typing error) was born in Dobinska Masa. He was born on 10/05/1889 to Stephen and Appalonia Oravec. My great grandmother, Anna Futey, was born sometime in 1893 in Jacub-Vola. This is all we know about her.  Apparently she had two brothers, John and Andrew, and a sister Helen. Kathy Jordan,  , (2005-09-26)
ORAVEC (Levoča) - Jaroslav Vokoun,  (2003-01-07)
ORAVECZ - Searching for: Oravec(z) in Vojčice (Vécse), Rakovec nad Ondavou (Rakócz), Veľké Ozorovce, Parchoviany, Zemplin County, as well as in the USA and worldwide. Surnames associated by marriage: Szeman, nikita, Nadzam, Hohos, Szemanyik, Csizsmar, Bujdos, Longinie and others. Also searching for Genyo in Mikovhas (probably Mikoháza, Hungary). Michael G. Oravecz, 1113 Dickens Ln, Naperville, IL 60563-4302, USA, , www (1999-07-13)
ORAVETZ (Dobšinská Maša) - My great grandfather, Maxillian Oravetz, (his last name was changed by Immigration typing error) was born in Dobinska Masa. He was born on 10/05/1889 to Stephen and Appalonia Oravec. My great grandmother, Anna Futey, was born sometime in 1893 in Jacub-Vola. This is all we know about her.  Apparently she had two brothers, John and Andrew, and a sister Helen. Kathy Jordan,  , (2005-09-26)
ORAVÍK - Zaujímajú ma rody Oravík, Gaňa, Záluszký, Podmanický z Považskej Teplej, Vrtižera, Hrabového. Mgr. Katarína Vrbjarová Oravíková, Gaštanova 1004/13, 014 01 Bytča, Tel.: +421-907 060 936, (2006-10-16)
ORAVSKY - I have more surnames to trace: Cupa, Figura, Hlavaty, Janacek, Kiripolsky, Krajcir, Lipar, Ondrus, Oravsky, Orsulak, Reszko, Rusnak, Runak, Vittek. John C. Orsulak, 208 E. Abbott St., Lansford, Pa 18232, USA, (2004-05-27)
ORENIČ (Gelnica, Medzilaborce) - Fred Orenics, (2000-08-22)
ORGONÍK (Kunov) - Zaujímajú ma rody Tinka (Bošáca), Steinecker (Častá/Hrádok), Blažek (Veselí), Šturdík (Trnava), Orgoník (Kunov), Chrenko (Adamovské Kochanovce). Igor Tinka, Prieseky 214, 913 08 Nová Bošáca, Tel.: 032-7712588, (2006-09-26)
ORLÍK - Skúmam rody Poliaček, Michalec, Orlík, Škoda. Ing. Dana Poliačková, Cabanova 13/A, 841 02 Bratislava, Tel.: 0908 943 033, (2012-02-27)
ORMIS (Revúca) - Zaujímajú ma rody Kubaščík - lokalita Kysucké Nové Mesto, Ormis, Ivanko - lokalita Revúca, Astaloš, Durmis - lokalita R. Sobota. Ing. Ľubomír Kubaščík, Severná 16, 974 01 Banská Bystrica, Tel.: 0907 655 999, (2010-10-01)
ORPHANIDES (Hybe, Vyšná Boca, Banská Bystrica) - Zaujímam sa o rody Orphanides, Klein a Jurányi. Mgr. Stanislav Žiška, Hybe 193, 032 31 Hybe, 044/5296 069, 0903 504 862 (2004-06-30)
ORSÁG - Skúmam vzťah k P. O. Hviezdoslavovi a k rodu Országhovcov v okolí Topoľčian, Trnavy. Silvia Orságová, Viedenská cesta 7, 851 01 Bratislava, SK, Tel. 0911 501 582, (2007-08-28)
ORSULAK (Buková, Prievaly) - I have traced my ancestry back to the year 1776 in the western villages of Bukova (Biksard) and Prievaly (Sandorf). I have also compiled listings of Slovak immigrants that arrived to St. Michael Parish in Lansford, Pa. I would be happy to communicate with anyone having roots in this area of Slovakia. John C. Orsulak, 208 E. Abbott St . Lansford, Pa 18232, USA, (2004-05-20)
ORSULAK - I have more surnames to trace: Cupa, Figura, Hlavaty, Janacek, Kiripolsky, Krajcir, Lipar, Ondrus, Oravsky, Orsulak, Reszko, Rusnak, Runak, Vittek. John C. Orsulak, 208 E. Abbott St., Lansford, Pa 18232, USA, (2004-05-27)
ORSZÁGH - Skúmam vzťah k P. O. Hviezdoslavovi a k rodu Országhovcov v okolí Topoľčian, Trnavy. Silvia Orságová, Viedenská cesta 7, 851 01 Bratislava, SK, Tel. 0911 501 582, (2007-08-28)
ORSZÁGH (Turiec - Martin, Vrútky) - Zaujímajú ma rody Ondruš-Liptovský Trnovec, Trnovský a Scholtz-Liptovský Mikuláš, Országh-Turiec (Martin, Vrútky), Cuninka-Trnava a okolie. Prof. MUDr. Dalibor Ondruš, DrSc., Košická 58, 821 08 Bratislava, Tel.: 0905/144 579, (2010-04-28)
ORSZÁGH - Mám predkov z rodu Országhovcov, Turzovcov z otcovej strany, Ruttkayovcov z matkinej strany. Čo sa týka Országhovcov - mojím prastarým otcom bol Ignác Országh a starým otcom Juraj Országh, z jeho bratov bol Jozef Országh krajinským prezidentom a Slavo Országh statkárom v Laclavej. Mali ešte brata Jána (zahynul) a sestru Vieru, vyd. Kohútovú. Môj starý otec zomrel a je pochovaný v Tatranskej Lomnici. Bol riaditeľom kúpeľov. Matka matkinho otca bola rodená Ruttkay Dauko Žigmunde, volala sa Anna Johana a bola vydatá Sekerková. PhDr. Danica Országhová, Š. Nahálku 10/65, 036 01 Martin, (2008-10-01)
ORSZÁGH - Bronislava Kalánková, J. Mazúra 4/10, 036 01 Martin (2000-03-01)
ORTUTA (Šariš) - Mgr. Monika Ortutová, Mukačevská 15, 080 01 Prešov, (2003-09-18)
OSIFČIN (Roztoky) - Mám záujem zistiť niečo o našej rodine, ktorá asi pochádza  z pobaltských republík a na Slovensko prišla cca pred 150 rokmi. Predkovia sa usadili v obci Roztoky, okr. Svidník. Milan Osifčin, Prešov, (2007-08-24)
OSTASHEK - I am currently researching my family history and feel that my great-grandmother Katharina hillip-Ostashek and my grandfather Pavel (or Paul) Ostashek come from this area.Ms. Rosalinde H. Marzluft, (2003-03-17)
OSTERMAYER - Bruckmayer, Henn, Fikar, Ostermayer, Malatinszki alebo Malatinsky, Wallner, gróf Mirowszki alebo Mirowszky Poľsko-Krakov, Anglee, Safranek alebo Schafranek, Kohut, Kubu. Ing Tibor Bruckmayer, (2003-04-03)
OSTROLÚCKY - Zaujímajú ma rody Bázlik, Ostrolúcky, Bakoš, Schwarz, Zamboj, Očovský, Štampaský z Pukanca, Bohuníc a Devičian. Mgr. Ľudmila Ponická, Ul. Ľ. Fullu 1988/16, 960 07 Zvolen, (2010-06-02)
OSTROLÚCKY - Mgr. Mária Šorecová, M. R. Štefánika 2554/23, 960 01 Zvolen
OSUSKY (Brezová pod Bradlom) - Ancestors of Jan Plačko, Anna Potúček, Štefan Šlahor and Anna Vician: Batka, Bednar, Blanar, Dodrv, Huska, Juriček, Klučovsky, Kopecky, Kostelancik, Kravarik, Kriško, Kučera, Makys, Osusky, Plačko, Posednik, Potúček, Repta, Šaško, Šlahor, Sluka, Tomaska, Valko, Vician, Zvonar. Anabeth Dollins, 1409 Terrace Drive, Pittsburgh, PA 15228-1608, USA, www, (2002-05-28)
OŠANEC - Jiří Ošanec, I. P. Pavlova 26, 779 00 Olomouc, Czech Republic,
OTTENHAUSEN - Zdravím heraldiky a genealogy na Slovensku. V matrikách jsem padl na osobu, která by Vás mohla zajímat: Dne 16. 8. 1845 se v Horšovském Týně, městě č.p. 44 konala svatba: ženich: Eduard Boroš von Rakoš, k.k.Leitnant v záloze "Gerichtstafelbeisitzer Eisenburger Commitats in Ungarn", syn Stephana Boros de Rakos, držitele statku z Tana v Uhrách a jeho manželky Susany rozené Békáhsy z Uher, 29 let, svobodný nevěsta: Mathilda svobodná paní von Hildprandt, manželská dcera Josefa svob. pána von Hildprandt und Ottenhausen, k.k. komorníka a rittmeistra na pensi v Horšovském Týně a jeho manželky Johanny rozené svob. paní Mandorf, manželské dcery pana Vincenze svob.pána von Mandorf, k.k. krajského hejtmana z Lublinu v Polsku a jeho manželky Karoliny rozené svob.paní Wanschurové von Rzehnitz, 22 let svobodná. Pramen: SOA Plzen, Matrika Horšovský Týn č. 45, folio 6. Antonín Kondrys, (2003-02-11)
OTTLIK - Ich befasse mich mit der Geschichte meiner Familie: Ottlik (Ottlyk). Sie stammt ursprünglich aus Horné Ozorovce und Kochanovce in der Nähe von Trenčín. Ich würde auch sehr gerne mehr über die Familie Divecky erfahren. Laut meinen Informationen hat ein Vorfahre der Familie Ottlik (Paska) im Jahre 1323 von dem ungarischen König Karl Robert von Anjou den ‚de Diweg’ Wappen bekommen, (2006-02-20) 
OTTLYK - Ich befasse mich mit der Geschichte meiner Familie: Ottlik (Ottlyk). Sie stammt ursprünglich aus Horné Ozorovce und Kochanovce in der Nähe von Trenčín. Ich würde auch sehr gerne mehr über die Familie Divecky erfahren. Laut meinen Informationen hat ein Vorfahre der Familie Ottlik (Paska) im Jahre 1323 von dem ungarischen König Karl Robert von Anjou den ‚de Diweg’ Wappen bekommen,  (2006-02-20)
OUJEZDSKÝ - Ľubomír Oujezdský, Parková 116, 900 42 Miloslavov, (2004-01-14)
OVCHAROVICH - Milan Huba, (2001-12-10)
OVEČKA - Zaujímam sa o rody Planka a Polák s náväznosťou na rody Písecký, Usnul, Šenker, Ovečka, Kus, Cvečka, Palkovič, Hnát, Sofka, Riška, Čulen. Ing. František Planka, 906 45 Štefanov 161, (2003-09-10)
OVSAK - We are doing research on our family tree and ancestry relating to the Slovakia in the 1600s and 1700s. We have traced our roots to this period with the following names: Joannes Urban (nobilis) abt 1789-1854, Elizabeth Petro 1796-1859, Georgius Ovsak, Anna Minar 1783, Joannes Ovsak 1808, Jonas Klobusovzsky Urban (nobilis) 1841-1916, Jonas Klobusovzsky Urban (nobilis) 1816-1879. James E. Roach, (2009-04-05)
OZIMY (Púchov) - Jozef Ozimy, Alexyho 9, 841 01 Bratislava, (2001-05-24)
OŽANIČ - Jiří Ošanec, I. P. Pavlova 26, 779 00 Olomouc, Czech Republic,