- O'Hanlon
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Abigail Elizabeth d. 10 Jan 1919Doris Teresa b. 1943
- O'Hara
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Anne d. 1844Anne b. 8 Apr 1797, d. 11 Mar 1870Annette Nancy Doughty d. 28 Oct 1959Arabella b. 28 May 1807, d. 13 Oct 1884Catherine b. c 1780, d. 11 Dec 1866Charlotte Pearson b. 1889, d. Jan 1965Donald John d. 3 Sep 1936Elizabeth b. 1799, d. 1875Elizabeth Henrietta b. 25 Feb 1847Enid A. b. 19 Sep 1904, d. 17 May 2001Florence Grace Douglas b. 31 Mar 1875, d. 16 Jan 1953Frances d. 23 Feb 1931Frances Anne d. 13 Jan 1891Frances Catriona FitzHerbert b. 19 Jul 1959Frederick William d. 8 Mar 1949Grace d. 8 Mar 1679/80Helen Elizabeth d. Jul 1866Hester Emily b. c 1793, d. 13 Aug 1852James d. 1838James b. c 1752, d. 21 Dec 1819James, 2nd Baron Tyrawley d. 14 Jul 1773Jane Marian d. 24 Nov 1949Karen Elizabeth d. 1990Kathleen d. 10 Jul 1962Laura b. 19 Jan 1881, d. 10 Mar 1919Maria d. 1714Mary d. 5 Feb 1769Mary b. 25 Sep 1708Muriel Helen Isabella Rice b. 25 Aug 1881, d. 22 Dec 1966Robert Patrick d. 1885Shelagh d. 1690
- O'Hare
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Christina b. 2 Jan 1965Eloise b. 1970Elspeth b. 1997Joséphine, Princesse de Belgique b. 17 Oct 2003Justin b. 7 Feb 1966Lillian b. 1994Marian b. 7 May 1941Oscar, Prince de Belgique b. 28 Apr 2008
- O'Hea
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Honoria b. 1805, d. 5 Oct 1859John d. 30 Jul 1847Lucy Bertram d. 5 Feb 1960Mary b. 1688, d. 30 Jul 1757Rosemary Leighton b. 8 Aug 1964
- O'Hearn
- O'Heeney
- O'Hern
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Mary Litogot b. c 1839, d. 1876
- O'Heyn
- O'Higgin
- O'Higgins
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Bryan d. c 1731Sara d. 20 Dec 1927
- O'Hine
- O'Hogan
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Elizabeth d. 1727Teresa d. 20 Jul 1809
- O'Hurley
- O'Kane
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Jacqueline b. 15 Dec 1966Patricia Christine b. 1917, d. 18 Mar 2012
- O'Kearney
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Lilian Maud d. 3 May 1937
- O'Kearney-Flynn
- O'Keary
- O'Keefe
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Adam Timothy b. 1975Art, Chief O'Keefe d. 18 Oct 1593Blake Anthony b. 1 Sep 1995Carol b. 1950Catherine Mary b. 21 Mar 1858, d. 15 Jun 1911Cecilia b. c 1805, d. 1 Feb 1876Diane b. 1954George Alexander b. 1974Jacob Alexander b. 1 Aug 1999John d. 1877Kate Angela b. 12 Mar 1845Linda b. 1952Louis d. 18 Mar 1930Maria Matilda d. 1910Marilyn Mary b. 1950Michelle Lisa b. 1968Naomi Laurel Erskine b. 1928Neil b. 1959Tracy Lana b. 1966Violet Bertha b. 1882, d. 21 Feb 1964
- O'Keeff
- O'Keeffe
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Arthur John Lanigan d. b 1976Kathleen Mary d. 7 Dec 1925Marie Helen d. 3 Jun 2004