- O'Düine
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Teig Reagh d. fr 25 Mar 1625 - 8 Jun 1626
- O'Fagan
- O'Fallon
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Cecilla d. 1776
- O'Farrel
- O'Farrell
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Aidan Thomas b. 25 Jan 1996Dorothy Flora d. 17 Dec 1955Edward d. 13 Aug 1926Fergus John b. 1 Feb 1994Finnian Drexel b. 25 Sep 1997Liam James b. 18 Sep 1992Noreen Elizabeth Mildred b. 8 Feb 1961
- O'Ferral
- O'Ferrall
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Anne d. 1778Cecilia Matilda d. 23 Nov 1886Conall John b. 29 Nov 1945Helen Maeve b. 21 Feb 1935James Boy d. b 1612Mary d. 1645Matilda Maria d. 25 May 1882Violet Eleanor June d. 10 Oct 1956
- O'Ferrall-Boy
- O'Ferrall-Caddell
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Paulina d. 5 May 1856Sophia Mary Margaret d. 18 Oct 1899
- O'Fflagherty
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Ellis d. 1711
- O'Flaherty
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Elizabeth d. 1825
- O'Flanagan
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Teresa d. 1817
- O'Flyn
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Margaret d. bt 31 Mar 1780 - 21 Jul 1781
- O'Flynn
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Caspar Michael b. 1969Emma Frances b. 31 Oct 1966Jean Eleanora Leckie b. 25 Sep 1946
- O'Fáoláin
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Caragh Mary b. 21 Nov 1949Tamsin Emilie b. 1973
- O'Gallagher
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Joan d. 22 Jun 1600Mary d. a 1632
- O'Gorman
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Christina Edith b. 1926Fiona Anne b. 2 Jun 1963Frances Alice d. 8 Jan 1947Gillian b. 1964Gillian M. b. 1956Mary d. 22 Jan 1948Patrick b. 1926, d. 14 Aug 2011
- O'Gowan
- O'Grady
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1st Baron, of Rockbarton, co. Limerick (Standish) b. 1766, d. 21 Apr 18402nd Baron, of Rockbarton, co. Limerick (Standish Darby) b. 1792, d. 22 Jul 18483rd Baron, of Rockbarton, co. Limerick (Standish) b. 8 Jul 1832, d. 10 Apr 18604th Baron, of Rockbarton, co. Limerick (Paget Standish) b. 1835, d. 18775th Baron, of Rockbarton, co. Limerick (Hardress Standish) b. 1841, d. 19186th Baron, of Rockbarton, co. Limerick (Frederick Standish) b. 1847, d. 11 Oct 19277th Baron, of Rockbarton, co. Limerick (Hugh Hamon Massy) b. 1860, d. 19308th Baron, of Rockbarton, co. Limerick (Richard) b. 1867, d. 19439th Baron, of Rockbarton, co. Limerick (Standish Bruce) b. 1869, d. 15 Oct 1955Ada Catherine d. Jan 1902Ada Rose b. 11 Apr 1876, d. Apr 1886Adelaide d. 4 Dec 1867Agnes Antoinette d. 1900Alexander b. 1866, d. 14 Jun 1939Amelia d. 26 May 1896Ana Lauruana b. 1856Angela de Courcy b. 10 May 1883, d. 10 Apr 1951Anna Grogan d. 14 Mar 1895Annabel b. 1843Anne d. 1849Anne d. 1878Anne d. 1717Anne Geraldine d. Aug 1871Annie Sybil d. 16 Feb 1956Belle d. 1903Berkeley Standish b. 24 Oct 1845, d. 23 Aug 1858Brian de Courcy, The O'Grady of Kilballyowen b. 2 Sep 1943Brien de Courcy b. 5 Nov 1891Cantwell b. 25 Mar 1879, d. Sep 1879Carew Smyth b. 9 Nov 1818, d. 1887Carew Standish b. 23 Apr 1860, d. 1 Jul 1889Catherine b. 1883Catherine Esther b. 27 Nov 1944Catherine Frances d. 2 Dec 1947Cathleen b. 1834Cecila b. 24 Jun 1855, d. 17 Sep 1919Charlotte b. 1879Charlotte Isabella d. 16 Oct 1873Darby d. 26 May 1857Darby b. 1665David Balfour b. 1887De Courcy b. 7 Apr 1888, d. 14 Feb 1915Denis d. 1569Denis George b. 1815, d. 11 Nov 1872Donagh Philip Standish b. 20 Jul 1960Donald d. 1309Donald de Courcy b. 31 May 1881, d. 28 Jan 1943Dorothea d. 1865Dorothea Louisa d. 1882Dudley b. 22 Dec 1827, d. 1883Dudley Vincent b. 7 May 1876Edith Faith d. 1877Edith Faith de Courcy d. May 1877Edmond d. 1576Edward George b. 1817, d. 1886Edward Smyth d. 5 Oct 1835Edward Stamer b. 12 Apr 1811, d. 17 Jul 1865Edward Stamer b. 23 Nov 1838, d. 18 Oct 1897Edward Stamer b. 7 Sep 1874Edward Waller de Courcy b. 6 Mar 1886Eileen Mary b. 1884Eileen McMahon d. 1974Eleanor d. 22 Mar 1897Eliazbeth Jane d. Feb 1896Eliza d. 7 Nov 1898Eliza d. Jul 1866Eliza Agnes Geraldine b. 7 Aug 1875Eliza Somerville de Courcy b. 18 Aug 1962Elizabeth d. 4 Mar 1834Elizabeth d. 14 Nov 1712Elizabeth b. 1800Elizabeth Anne b. 1784, d. 1860Ellen d. 1857