- Otto
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Elizabeth Margaret b. 1910, d. 15 Jan 2011Elsjie Elizabeth b. 1846, d. 1938John Ellison d. 9 Nov 1952Petrus Albertus Ryno b. 1810, d. 1890Veronica d. 29 Oct 1960
- Ottoloni
- Ottrubay
- Otway
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1st Baronet (Robert Waller) b. 26 Apr 1770, d. 12 May 1846Anne Digby d. 14 Dec 1899Clementina d. 1851Cooke d. 1807Florence Phoebe d. 27 Jul 1942Henrietta d. 25 Mar 1909Henrietta b. 3 Nov 1809, d. 14 Nov 1879Henry d. 13 Sep 1815Letitia d. 17 Feb 1794Martha d. Mar 1802Martha Stuart d. 23 Mar 1895Mary Ann d. 25 Sep 1902Phoebe Georgina Frances d. 1939Priscilla Margaret b. 25 Dec 1795, d. 1844Robert Waller, 1st Bt. b. 26 Apr 1770, d. 12 May 1846Ruby d. 1939Sarah b. c 1756, d. Mar 1780Sarah b. 2 Jul 1768, d. 21 Feb 1862
- Otway-Cave
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Anne b. 1801, d. 22 May 1871Catherine d. 4 Nov 1875Henrietta b. 3 Nov 1809, d. 14 Nov 1879Henrietta, Baroness Braye b. 3 Nov 1809, d. 14 Nov 1879Maria b. 24 Dec 1792, d. 13 May 1879Robert d. 29 Nov 1844Sarah b. 2 Jul 1768, d. 21 Feb 1862Sophia b. 2 Aug 1794, d. 30 Dec 1849
- Otway-Ruthven
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Cecil Harriet Beatrice Bermingham d. 26 Sep 1935Jos b. 1957Margaret d. 7 Dec 1953Mary-Anne b. 1955, d. 14 Feb 2020Oonagh Beryl Margaret d. 12 Oct 2005Robert Jocelyn Oliver b. 1957Robert Mervyn Bermingham d. 15 Jul 1919Robert Mervyn Birmingham (Major) b. 1930, d. 2018
- Ouchterlony
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Alison Stewart b. 15 Sep 1946Constance Kathleen Gaisford b. 1885, d. 24 Aug 1945Doreen Mary Joan b. 1909Guy David b. 1890James Angus Heathcote b. 9 Aug 1973John Palgrave Heathcote (Major) b. 1884, d. 7 Jun 1917Louisa Bridget b. 22 Feb 1798, d. c 1862Maria Frances Digby b. 29 Aug 1817, d. 25 Jul 1846Marie Eleanor b. 1845, d. 1896Marjorie Mary b. 11 Aug 1915, d. Jan 1920Mary Ann b. b 1861Nora Constance b. 1883Peter Anthony Heathcote b. 19 Apr 1971Teresa Mary b. 22 Jun 1969Thomas b. 1809, d. 8 Oct 1854Thomas Charles Alexander Heathcote (Commander) b. 23 Oct 1888, d. 3 Oct 1971Thomas Heathcote, 24th of Gynd b. c 1841, d. 12 Jun 1922
- Oudaille
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Chrissie Ward b. 1900, d. 1988
- Oudenaarde
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Arnulf IV Heer van b. c 1180, d. 21 Nov 1242Jan Heer van b. 1220, d. 12 Dec 1293Maria van Vrouwe van Pamele d. 1290Maria, Dame du Tour et de Chimay d. c 1241
- Oudermeulen
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Claire Julia van der b. 27 Mar 1864, d. 9 Apr 1949Cornelis Johan van der b. 28 Mar 1838, d. 1 May 1904Eduard van der b. 2 Jan 1867, d. 18 May 1937Julia Carolina Maria van der b. 19 Sep 1895, d. 22 Nov 1984
- Oudtshoorn
- Ouellet
- Ouellette
- Oughterson
- Oughterstone
- Oughton
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1st Baronet (Adolphus) d. 4 Sep 1736Adolphus d. 1684Adolphus, 1st Bt. d. 4 Sep 1736Frances b. 1665, d. 1714James Adolphus Dickenson b. 1720, d. 2 May 1780
- Oughtred
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Elizabeth d. 4 Nov 1576Elizabeth b. 1511, d. 1563
- Ougritchitch-Trebinsky
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Arkadj b. 4 May 1897, d. 10 Mar 1982Elena b. 14 Jun 1896, d. 15 Apr 1977Nina b. 15 Jan 1925, d. 10 Jan 2019
- Ould
- Ouldaker
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Mary d. c 10 Dec 1789
- Oulman
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Simone Renée b. 1886, d. 1974
- Oulton
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Edith Mary McVeagh b. 27 Feb 1822, d. 29 Feb 1892Mary d. 28 Nov 1865William Platt d. 26 Jun 1867
- Oultremont de Wégimont
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Ferdinand Louis François Michel Graaf d', Comte d'Oultremont de Wégimont b. 28 Sep 1760, d. 14 Nov 1799Ferdinand Louis François Michel d' b. 28 Sep 1760, d. 14 Nov 1799Henrietta Adrienne Ludovica Flora d' b. 28 Feb 1792, d. 26 Oct 1864Henrietta Adrienne Ludovica Flora d' b. 28 Feb 1792, d. 26 Oct 1864Jean Baptiste Francois Georges Graaf d', Baron de Han-sur-Lesse et Seigneur de Wegimont b. 24 Apr 1715, d. 3 Apr 1782Joseph Ferdinand Emilie Graaf d', Heer van Drunen b. 27 Feb 1797, d. 11 Apr 1869Karel Ferdinand Joseph Graaf d' b. 18 Jul 1789, d. 11 Mar 1852
- Oultremont
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Adhemar d' b. 9 Jul 1845, d. 9 Jul 1910Adrien d' b. 1918Antoinette d' b. 19 Jul 1885, d. 20 Aug 1966Antoinette d' b. 19 Jul 1885, d. 20 Aug 1966Bathilde Louise Caroline Marie Françoise Comtesse d b. 5 Jan 1853, d. 7 Jan 1933Clementine d' b. 5 Apr 1913, d. 26 Aug 2006Clotilde d' b. 1952Colienne d' b. 1956Emanuel Octave Eugene d' b. 8 Mar 1881, d. 3 Nov 1958Henriette d' b. 20 May 1910, d. 17 Apr 2004Isabelle Marie Georgine Antoinette Ghislaine d' b. 11 Jul 1919, d. 9 Mar 2000Klementine d' b. 9 Jul 1857, d. 3 Aug 1893Marc-Antoine d' b. 1927Maria-Theresia d' b. 1938Marie Blanche d' b. 1921Philippe d' b. 14 Jun 1978Rodolphe d' b. 24 Nov 1882, d. 4 Jun 1921Sophie d' b. 1949
- Oundley
- Ouro-Petro
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Gil Roberto Fernando de b. 9 Jul 1931, d. 2 Nov 1991Maria Elena b. 25 Apr 1932, d. 14 May 1981
- Ourousova
- Ourry
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Caroline Treby d. 10 Dec 1842Charity b. 1722Paul Henry b. 3 Oct 1719, d. 31 Jan 1783
- Ousby
- Ouseley
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1st Baronet (Gore) b. 24 Jun 1770, d. 18 Nov 1844Adelaide Caroline d. 1962Baron, of Peckham Rye in the London Borough of Southwark (Herman George) b. 24 Mar 1945, d. 2 Oct 2024Frances Rhoda d. 2 Jun 1907Frances Sarah Peace d. 15 Sep 1896Frederick Arthur Gore (Sir) b. 1825, d. 1889Gore, 1st Bt. b. 24 Jun 1770, d. 18 Nov 1844Herman George, Baron Ouseley b. 24 Mar 1945, d. 2 Oct 2024Marcia Cordelia d. 10 Jan 1914Richard d. b 1870William b. 1693, d. 1705
- Oustinov
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Paul b. 23 Aug 1848, d. 11 Mar 1903Serge d. 1928
- Outerbridge
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Amanda Jane b. 17 Jul 1951Mary Everest b. 1868, d. 1954