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Abercorn, Marquess of (GB, 1790)


Creation: let. pat. 15 Oct 1790


Family name: Hamilton




See Duke of Abercorn



John James [Hamilton], 9th Earl of Abercorn later 1st Marquess of Abercorn, KG PC

1st son and heir of Capt Hon John Hamilton, RN (by his wife Harriet Eliot, widow of Richard Eliot, of Port Eliot, co. Cornwall. and illegitimate dau. of Rt Hon James Craggs), 2nd son of James [Hamilton], 7th Earl of Abercorn


Jul 1756

mar. (1)

20 Jun 1779 Catharine Copley (d. 13 Sep 1791), 3rd dau. of Sir Joseph Moyle later Copley, 1st Bt., of Sprotborough, co. York, by his wife Mary Buller, dau. of John Buller, of Morval, co. Cornwall

children by first wife:

1. Lord James Hamilton, styled Viscount Hamilton, Member of Parliament for Dungannon 1805-07 and for Liskeard 1807-12 (b. 7 Oct 1786;  dvp. 27 May 1814), mar. 25 Nov 1809 Lady Harriet Douglas (b. 8 Jun 1792; granted the style and precedence of the daughter of an Earl by Royal Warrant 1835;  mar. (2) 8 Jul 1815 as his second wife George [Gordon], 4th Earl of Aberdeen;  d. 26 Aug 1833), sister of George Sholto [Douglas], 17th Earl of Morton, and 2nd dau. of Hon John Douglas (by his wife Lady Frances Lascelles, 1st dau. of Edward [Lascelles], 1st Earl of Harewood), 1st son by his second wife of James [Douglas], 14th Earl of Morton, and had issue:

1a. Hon James Hamilton, later 2nd Marquess of Abercorn later 1st Duke of Abercorn

2a. Rt Hon Lord Claud Hamilton, Member of Parliament for Co. Tyrone 1835-37 and 1839-74, Vice-Chamberlain of the Household 1866-68 (b. 27 Jul 1813;  d. 3 Jun 1884), mar. 7 Aug 1844 Lady Emma Elizabeth Proby (d. 24 Jun 1900), 2nd dau. of Granville Leveson [Proby], 3rd Earl of Carysfort, by his wife Isabella Howard, 2nd dau. of Hon Hugh Howard (by his wife Catharine Bligh, dau. of Very Rev Robert Bligh, Dean of Elphin), 3rd son of Ralph [Howard], 1st Viscount Wicklow, and had issue

1a. Lady Harriet Hamilton (b. 21 Mar 1812; d. 19 Mar 1884), mar. 15 May 1836 Adm William Alexander Baillie later Baillie-Hamilton RN (d. 1 Oct 1881), 3rd son of Ven Charles Baillie, Archdeacon of Cleveland, and had issue

2. Lord Claud Hamilton MP (b. 1 Nov 1787;  dvp. Jun 1808)

1. Lady Harriet Margaret Hamilton (b. 1781; dvp. 30 Apr 1803)

2. Katherine Constantia Hamilton (b. 7 Oct 1782; dvp. 23 May 1783)

3. Lady Katharine Elizabeth Hamilton (b. 10 Jan 1784; d. 20 Feb 1812), mar. 28 Jul 1805 as his first wife George [Gordon], 4th Earl of Aberdeen, and had issue

4. Lady Maria Hamilton (b. 28 Feb 1785; dvp. 21 Jan 1814)

mar. (2)

4 Mar 1792 (div. Apr 1799) his cousin Lady Cecil Hamilton (raised to the style and precedence of an Earl's daughter by Royal Warrant 27 Oct 1789;  mar. (2) 23 May 1799 Capt Sir Joseph Copley, 3rd Bt., of Sprotborough, co. York;  d. 19 Jun 1819), 5th dau. and cohrss. of Hon Rev George Hamilton, Canon of Windsor (by his wife Elizabeth Onslow, only dau. by his second wife of Lt Gen Richard Onslow, Governor of Fort William and Plymouth), 3rd son of James [Hamilton], 7th Earl of Abercorn

only child by second wife:

4. Lady Cecil Frances Hamilton (b. 19 Jul 1795; d. 7 Jul 1860), mar. 16 Feb 1816 William Forward [Howard], 4th Earl of Wicklow, and had issue

mar. (3)

3 Apr 1800 Lady Anne Jane Hatton (b. Apr 1763; widow of Henry Hatton MP, of Great Clonard, co. Wexford;  dsp. 8 May 1827), 1st dau. of Arthur Saunders [Gore], 2nd Earl of Arran, by his first wife Hon Catharine Annesley, only dau. of William [Annesley], 1st Viscount Glerawly


27 Jan 1818


15 Oct 1790 Marquess of Abercorn (Peerage of Great Britain)

suc. by



Member of Parliament for East Looe 1783-84 and for St Germans 1784-89;  suc. his uncle 9 Oct 1789 as 9th Earl of Abercorn;  Privy Councillor (Ireland) 1794;  Knight of the Garter 1805


James [Hamilton], 2nd Marquess of Abercorn later 1st Duke of Abercorn


10 Aug 1868 Marquess of Hamilton and Duke of Abercorn


The Marquessate of Abercorn has been held by the Dukes of Abercorn since 10 Aug 1868.




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