King Charles II. By his wife he had thirteen children: Francis Seymour-Conway, 2nd Marquess of Hertford (12 February 1743 – 28 June 1822) Lady Anne Seymour-Conway (1 August 1744 – 4 November 1784), married Charles Moore, 1st Marquess of Drogheda Lord Henry Seymour-Conway (15 December 1746 – 5 February 1830) Lady Sarah Frances Seymour-Conway (27 September 1747 – 20 July 1770), married Robert Stewart, 1st Marquess of Londonderry Lord Robert Seymour-Conway (20 January 1748 – 23 November 1831) Lady Gertrude Seymour-Conway (9 October 1750 – September 1793), married George Mason-Villiers, 2nd Earl Grandison Lady Frances Seymour-Conway (4 December 1751 – 11 November 1820), married Henry Fiennes Pelham-Clinton, Earl of Lincoln, a son of Henry Fiennes Pelham-Clinton, 2nd Duke of Newcastle Rev. Hon. Edward Seymour-Conway (1752–1785), canon of Christ Church, Oxford, unmarried Lady Elizabeth Seymour-Conway (1754–1825) died unmarried Lady Isabella Rachel Seymour-Conway (25 December 1755 – 1825), married George Hatton, a member of parliament Admiral Lord Hugh Seymour (29 April 1759 – 11 September 1801), married Lady Anne Horatia Waldegrave, a daughter of James Waldegrave, 2nd Earl Waldegrave Lord William Seymour-Conway (29 April 1759 – 31 January 1837) Lord George Seymour-Conway (21 July 1763 – 10 March 1848). He married Isabella Hamilton, granddaughter of James Hamilton, 7th Earl of Abercorn, and was the father of Sir George Hamilton Seymour, a British diplomatist He is not known to have suffered himself from any mental abnormality, but a noted strain of eccentricity, even madness, appeared among his descendants: the debauched behaviour of his grandson, the 3rd Marquess, and the suicide of another grandson, Viscount Castlereagh, were both attributed to a strain of madness supposed to be hereditary in the Seymour Conway family. Lord Hertford died in Surrey, England. References 1718 births 1794 deaths Diplomatic peers Francis Knights of the Garter Lord-Lieutenants of Montgomeryshire Lord-Lieutenants of Warwickshire Lords Lieutenant of Ireland Members of the Privy Council of Great Britain Members of the Privy Council of Ireland People from Chelsea, London Ambassadors of Great Britain to France 1