- Mounsey-Heysham
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Anna b. 29 May 1991Benjamin b. 3 Mar 1986Clementine Marsha b. 1986Isla Rose b. 31 Jan 2017Maximilian Wolfe b. 2 Oct 2018Penelope Auriol b. 12 Feb 1959Rory b. 2 Feb 1989Toby H. b. 23 Jan 1984
- Mount Alexander
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1st Earl of (Hugh) b. 1623, d. 15 Sep 16634th Earl of (Hugh) d. 27 Feb 1744/45
- Mount Charles
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1st Earl of (Henry) b. 26 Dec 1766, d. 28 Dec 18321st Viscount (Henry) b. 26 Dec 1766, d. 28 Dec 18322nd Earl of (Francis Nathaniel) b. 11 Jun 1797, d. 17 Jul 18762nd Viscount (Francis Nathaniel) b. 11 Jun 1797, d. 17 Jul 18763rd Earl of (George Henry) b. 3 Feb 1825, d. 2 Jun 18823rd Viscount (George Henry) b. 3 Feb 1825, d. 2 Jun 18824th Earl of (Henry Francis) b. 1 Oct 1857, d. 28 Aug 18974th Viscount (Henry Francis) b. 1 Oct 1857, d. 28 Aug 18975th Earl (Victor George Henry Francis) b. 30 Jan 1883, d. 9 Nov 19185th Viscount (Victor George Henry Francis) b. 30 Jan 1883, d. 9 Nov 19186th Earl of (Frederick William Burton) b. 24 Jun 1890, d. 1 Apr 19746th Viscount (Frederick William Burton) b. 24 Jun 1890, d. 1 Apr 19747th Earl of (Frederick William Henry Francis) b. 13 Mar 1924, d. 3 Mar 20097th Viscount (Frederick William Henry Francis) b. 13 Mar 1924, d. 3 Mar 20098th Earl of (Henry Vivien Pierpont) b. 23 May 19518th Viscount (Henry Vivien Pierpont) b. 23 May 1951Earl of (Alexander Burton) b. 30 Jan 1975Earl of (Henry Francis) b. 6 Apr 1795, d. 26 Dec 1824Earl of (Henry Vivien Pierpont) b. 23 May 1951Earl of (Victor George Henry Francis) b. 30 Jan 1883, d. 9 Nov 1918
- Mount Crawford
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1st Viscount of (John) b. 12 May 1669, d. 24 Dec 1708
- Mount Eagle
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1st Baron, of Westport, co. Mayo (John) b. c 1709, d. 4 Jul 17762nd Baron, of Westport, co. Mayo (Peter) b. c 1731, d. 28 Dec 17803rd Baron, of Westport, co. Mayo (John Denis) b. 11 Jun 1756, d. 2 Jun 1809
- Mount Edgcumbe and Valletort
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1st Viscount (George) b. 1720, d. 4 Feb 17952nd Viscount (Richard) b. 13 Sep 1764, d. 26 Sep 18393rd Viscount (Ernest Augustus) b. 23 Mar 1797, d. 3 Sep 18614th Viscount (William Henry) b. 5 Nov 1833, d. 25 Sep 19175th Viscount (Piers Alexander Hamilton) b. 2 Jul 1865, d. 10 Apr 19446th Viscount (Kenelm William Edward) b. 9 Oct 1873, d. 10 Feb 19657th Viscount (Edward Piers) b. 13 Jul 1903, d. 9 Dec 19828th Viscount (Robert Charles) b. 1 Jun 1939, d. 12 Jun 2021
- Mount Edgcumbe
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1st Earl of (George) b. 1720, d. 4 Feb 17952nd Earl of (Richard) b. 13 Sep 1764, d. 26 Sep 18393rd Earl of (Ernest Augustus) b. 23 Mar 1797, d. 3 Sep 18614th Earl of (William Henry) b. 5 Nov 1833, d. 25 Sep 19175th Earl of (Piers Alexander Hamilton) b. 2 Jul 1865, d. 10 Apr 19446th Earl of (Kenelm William Edward) b. 9 Oct 1873, d. 10 Feb 19657th Earl of (Edward Piers) b. 13 Jul 1903, d. 9 Dec 19828th Earl of (Robert Charles) b. 1 Jun 1939, d. 12 Jun 2021Countess of (Caroline Augusta) b. 1808, d. 2 Nov 1881Countess of (Caroline Cecilia) d. 23 Feb 1909Countess of (Edith) b. 8 Nov 1878, d. 1 Aug 1935Countess of (Emma) d. 22 Dec 1807Countess of (Joan Ivy) d. 8 Aug 2008Countess of (Katherine Elizabeth) b. 9 Jan 1840, d. 3 Sep 1874Countess of (Lilian Agnes) b. 1877, d. 28 Sep 1964Countess of (Sophia) b. 26 Mar 1768, d. 17 Aug 1806Countess of (Victoria Effie) d. 29 Nov 1979
- Mount Leinster
- Mount Sandford of Castlerea
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1st Baron, co. Roscommon (Henry Moore) b. 28 Jul 1751, d. 29 Dec 18142nd Baron, co. Roscommon (Henry) b. 10 Mar 1805, d. 14 Jun 1828
- Mount Stephen
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1st Baron, of Mount Stephen, in the Province of British Columbia and Dominion of Canada, and of Dufftown, co. Banff (George) b. 5 Jun 1829, d. 29 Nov 1921Baroness (Charlotte Annie) d. 10 Apr 1896Baroness (Georgiana Mary) d. 1 May 1933
- Mount Stuart of Wortley
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1st Baroness, co. York (Mary) b. Feb 1718, d. 6 Nov 17942nd Baron, co. York (John) b. 30 Jun 1744, d. 16 Nov 18143rd Baron of, co. York (John) b. 10 Aug 1793, d. 18 Mar 18484th Baron, co. York (John Patrick) b. 12 Sep 1847, d. 9 Oct 19005th Baron, co. York (John) b. 20 Jun 1881, d. 25 Apr 19476th Baron, co. York (John) b. 4 Aug 1907, d. 14 Aug 19567th Baron, co. York (John) b. 27 Feb 1933, d. 21 Jul 19938th Baron, co. York (John Colum) b. 26 Apr 1958, d. 22 Mar 20219th Baron, co. York (John Bryson) b. 21 Dec 1989
- Mount Stuart
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Lord (John Bryson) b. 21 Dec 1989Viscount (John) b. 30 Jun 1744, d. 16 Nov 1814Viscount (John) b. 25 Sep 1767, d. 22 Jan 1794
- Mount Temple of Mount temple
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1st Baron, co. Sligo (William Francis) b. 13 Dec 1811, d. 17 Oct 1888
- Mount Temple
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1st Baron, of Lee, co. Southampton (Wilfred William) b. 13 Sep 1867, d. 3 Jul 1939Baroness (Muriel Emily) d. 24 Jun 1954
- Mount
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1st Baronet (William Arthur) b. 3 Aug 1866, d. 8 Dec 19302nd Baronet (William Malcolm) b. 28 Dec 1904, d. 22 Jun 19933rd Baronet (William Robert Ferdinand) b. 2 Jul 1939Alan Reginald d'Arcy b. 1907, d. 1967Antony Francis b. 5 May 1950Caroline Jane d. 4 May 1860Cecil William b. c 1868Cecilia Mary b. 15 Jan 1931, d. 4 Dec 2018Charlotte d. 17 Jan 1879Charlotte Elizabeth d. 18 Jul 1826Clare b. 14 Feb 1938David Richard b. 18 Apr 1948Diana Mary b. 28 Sep 1947Elizabeth d. 1763Elizabeth d. 1785Elizabeth Nance d. c 1995Ethel Georgina b. c 1866, d. 1949Ferdinand b. 2 Jul 1939Frances Leone b. 19 Sep 1941Francis d. 13 Oct 1915Francis Ferdinand b. 27 Sep 1970, d. 18 Nov 1970George Richard b. 25 Jun 1911, d. 1991Georgeanne b. 16 Oct 1941, d. 24 Sep 2015Henry Francis b. 1971Hilda Lucy Adelaide b. 23 May 1875, d. 3 Apr 1950Isabel Marion b. 1867Jane d. 5 Apr 1772Jenny d. 11 Oct 1843John b. 24 Jul 1725, d. 12 Jul 1786John Herbert d. 1973John Richard Herbert Crichton b. 7 Sep 1953Julia Agnes Cynthia b. 5 Nov 1913, d. 10 Sep 1956Lisa Jacqueline b. 19 Feb 1965Margaret Emily b. 3 Oct 1873, d. 1956Margaret Ruth b. 1910, d. 1977Marianne Emily b. c 1838, d. 19 Sep 1928Mark Donald Crichton b. 4 Jan 1957Mary d. 26 Jun 1745Mary Fleur b. 22 Oct 1934Mary Julia b. 1972Patricia Elizabeth d. b 1999Patricia Jane b. 1 Jul 1920, d. 13 Jan 2004Ralph d. 1668Richard b. 1654, d. 29 Jun 1722Robert Francis b. 7 Jun 1907, d. 22 Aug 1969Sally V. b. c 1945Sarah d. 1717Selina Clare b. 9 Apr 1950Serena Georgeanne b. 16 Oct 1941, d. 24 Sep 2015Viola Clare b. 14 Feb 1938Virginia Jane b. 9 Aug 1947William d. 23 Feb 1769William b. 3 Jan 1753, d. 15 Jun 1815William b. 21 Nov 1787, d. 10 Apr 1869William Arthur, 1st Bt. b. 3 Aug 1866, d. 8 Dec 1930William George b. 18 Jul 1824, d. 14 Jan 1906William Malcolm, 2nd Bt. b. 28 Dec 1904, d. 22 Jun 1993William Robert Ferdinand, 3rd Bt. b. 2 Jul 1939William Robert Horatio b. 12 May 1969
- Mount-Earl
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1st Viscount (Valentine Richard) b. 30 Jul 1752, d. 24 Aug 18242nd Viscount (Windham Henry) b. 29 Sep 1782, d. 6 Aug 18503rd Viscount (Edwin Richard) b. 19 May 1812, d. 6 Oct 18714th Viscount (Windham Thomas) b. 12 Feb 1841, d. 14 Jun 19265th Viscount (Windham Henry) b. 7 Feb 1857, d. 23 Oct 19526th Viscount (Richard Southwell Windham Robert) b. 18 May 1887, d. 23 Aug 19657th Viscount (Thady Windham Thomas) b. 27 Oct 1939, d. 25 Mar 2011Viscountess (Margaret Mary) d. 6 Nov 1821
- Mountagu
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1st Lord (Edward) b. c 1304, d. 14 Jul 1361Edward b. b 1349, d. c 1349Edward b. c May 1361, d. 4 Oct 1361Edward, Lord Mountagu b. c 1304, d. 14 Jul 1361Elizabeth b. a 1343, d. 29 Nov 1361Etheldreda d. c 1349Ethelreda b. c 1359Maud b. c 1345, d. b 1361
- Mountain
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1st Baronet, of Oare Manor, co. Somerset and Brendon, co. Devon (Edward Mortimer) b. 24 Nov 1872, d. 22 Jun 19482nd Baronet, of Oare Manor, co. Somerset and Brendon, co. Devon (Brian Edward Stanley) b. 22 Aug 1899, d. 17 Feb 19773rd Baronet, of Oare Manor, co. Somerset and Brendon, co. Devon (Denis Mortimer) b. 2 Jun 1929, d. 24 Oct 20054th Baronet, of Oare Manor, co. Somerset and Brendon, co. Devon (Edward Brian Stanford) b. 19 Mar 1961Ann d. Sep 1804Armine Simcoe Henry b. 4 Feb 1794, d. 8 Feb 1854Brian Edward Stanley, 2nd Bt. b. 22 Aug 1899, d. 17 Feb 1977Camilla Margaret b. 1 Apr 1993Camilla Sarah b. 8 Feb 1965Catherine b. 12 Jun 1942Charlotte Anna b. 1824, d. 4 Jun 1903Denis Mortimer, 3rd Bt. b. 2 Jun 1929, d. 24 Oct 2005Doris Elsie b. 1906, d. 2000Edward Brian Stanford, 4th Bt. b. 19 Mar 1961Edward Mortimer, 1st Bt. b. 24 Nov 1872, d. 22 Jun 1948Eleanor Jemima Madeleine b. 2 Jun 2001Eliza Mildred d. 1836Elizabeth d. 12 Nov 1844Evelyn Ellen Regina d. 13 Jan 1950Fleur Caroline b. 22 Feb 1933Francis b. Sep 1748Georgina Lily Fleur b. 1 Aug 1959Gertrude Margaret b. 1884, d. 21 Jan 1965Grace Bindley b. 1861, d. 1947Harry Brian Pownall b. 21 Jun 1991Henry b. 24 Apr 1808Henry Nicholas b. 29 Nov 1967Hélène Fleur Mary Kirwan b. 2 Jan 1933, d. 7 Aug 2004John d. Oct 1732John b. 1687, d. Jan 1747Leila Keane b. 2 Feb 1890, d. 5 Nov 1946Louisa d. 24 Feb 1916Marie Clare b. 17 Aug 1974Mary d. Jun 1718Mary d. Mar 1760Mountain d. Mar 1760Nathalie Frances b. 6 Jul 1970Nicholas Brian Edward b. 15 Feb 1936Rory b. 25 Mar 1998Stanford Henry Mortimer b. 15 Sep 1834, d. 11 Mar 1890Thomas b. 1723, d. Jul 1805Thomas b. Apr 1772, d. 5 Jun 1858Thomas Denis Edward b. 14 Aug 1989William Denis Charles b. 18 Nov 1966