He m. 26 Sep 1776 Eleanor Elliot (b. 1758; d. 18 May 1818), sister of Gilbert [Elliot later Elliot-Murray-Kynynmound], 1st Earl of Minto, and 2nd dau. of Rt Hon Sir Gilbert Elliot, 3rd Bt., of Minto, co. Roxburgh, by his wife Agnes Dalrymple-Murray-Kynynmound, dau. and hrss. of Hugh Dalrymple later Dalrymple-Murray-Kynynmound, of Melgund, co. Forfar, and Kynynmound, co. Fife.
He was raised to the peerage on 18 Nov 1789 as Baron Auckland [I] and created on 22 May 1793 Baron Auckland, of West Auckland in the County Palatine of Durham [GB].
Hon William Frederick Elliot Eden, a Teller of the Exchequer (b. 19 Jan 1782; drowned in the River Thames v.p. 19 Jan 1810)
Hon George Eden, later 2nd Baron Auckland later 1st Earl of Auckland
Hon Henry Eden (b. 1787; dvp. Jun 1794)
Hon Robert John Eden, later 3rd Baron Auckland
Hon Eleanor Agnes Eden (b. 9 Jul 1777; dsp. 15 Oct 1851), mar. 1 Jun 1799 as his second wife Robert [Hobart], 4th Earl of Buckinghamshire
Hon Catharine Isabella Eden (b.20 Sep 1778; dvp. and sp. 10 Aug 1810), mar. 22 Jul 1806 Nicholas [Vansittart], 1st Baron Bexley
Hon Elizabeth Charlotte Eden (b. 21 Mar 1780; d. 17 Apr 1847), mar. 31 Mar 1800 Francis Godolphin [Osborne], 1st Baron Godolphin,+
Hon Caroline Eden (d. 2 Mar 1851), mar. 17 Jun 1806 Arthur Vansittart, of Shottesbrooke, co. Berkshire (d. 31 May 1829), and had issue
Hon Mary Louisa Eden (d. 2 Dec 1858), mar. 26 Jun 1806 Andrew Wedderburn later Colville (d. 3 Feb 1856)
Hon Mary Dulcibella Eden (d. 20 Mar 1862), mar. 15 Jul 1819 Charles Drummond (b. 4 Sep 1790; d. 28 Aug 1858), 1st son and heir of Charles Drummond, banker (by his wife Frances Dorothy Lockwood, 2nd dau. of Rev Edward Lockwood, of Dews Hall, Lambourne, co. Essex), 2nd son of Hon Robert Drummond, banker, of Cadland Park, co. Hampshire, and Charing Cross, London (by his wife Winifred Thompson, dau. of William Thompson, of Ipsden, co. Oxford), 3rd son of William [Drummond], 4th Viscount Strathallan+
Lee, Stephen M.; rev. Sinéad Agnew. "Eden, William, first Baron Auckland (1744–1814)". Oxford Dictionary of National Biography (Sept 2004; online edn, May 2009). Retrieved 8 November 2009. Eden was educated at Durham School (1755–8) and Eton College (1758–62) before going up to Christ Church, Oxford, in 1762.