Elizabeth Wyndham was the daughter of Sir William Wyndham, 3rd Bt. and Catherine Seymour.1 She married Rt. Hon. George Grenville, son of Richard Grenville and Hester Temple, Countess Temple, in 1749.2 She died on 5 December 1769. Her married name became Grenville. Children of Elizabeth Wyndham and Rt. Hon. George Grenville

* Hester Grenville+ d. 13 Nov 1847 * Charlotte Grenville+ b. c 1751, d. 29 Sep 18322 * George Nugent-Temple-Grenville, 1st Marquess of Buckingham+ b. 17 Jun 1753, d. 11 Feb 18133 * Rt. Hon. Thomas Grenville b. 31 Dec 1755, d. 17 Dec 18462 * Elizabeth Grenville+ b. 24 Oct 1756, d. 21 Dec 18422 * William Wyndham Grenville, 1st Baron Grenville b. 25 Oct 1759, d. 12 Jan 18342 * Catherine Grenville+ b. 1761, d. 6 Nov 1796