Background
Beresford was the eldest son of Marcus Beresford, 1st Earl of Tyrone and his wife, Katherine, Baroness de la Poer.
Beresford was the eldest son of Marcus Beresford, 1st Earl of Tyrone and his wife, Katherine, Baroness de la Poer.
He was educated at Kilkenny College.
He was Governor of Waterford from 1766 and custos rotulorum of that county from 1769 to 1800, during which time he was made a Knight of Street Patrick, created Baron Tyrone in the Peerage of Great Britain in 1786, and elevated as a marquess in 1789. Marcus, Lord Le Poer (March 1771 – 8 August 1783)
Henry de la Poer, Earl of Tyrone, later 2nd Marquess of Waterford (1772–1826), politician
Most Review Lord John George (1773–1862), Archbishop of Armagh
Lord George Thomas (1781–1839), politician
Lady Isabella Anne (28 May 1776 – 7 May 1850), married Sir John Brydges
Lady Catharine (11 September 1777 – 23 June 1843)
Lady Anne (26 July 1779 – 27 November 1842)
Lady Elizabeth Louisa (2 February 1783 – 6 January 1856), married (1) Sir Denis Pack (2) Sir Thomas Reynell, Bt
He also had two illegitimate sons, William Carr Beresford, 1st Viscount Beresford, and Sir John Beresford, 1st Baronet.
Lord Waterford died in 1800 and his titles passed to his eldest surviving legitimate son, Henry.
From 1757-1760, he was a Member of the Irish House of Commons for Waterford County from 1757 to 1760, and for Coleraine from 1761 until 1763, when he inherited his father"s earldom, entered the Irish House of Lords and was admitted to the Privy Council of Ireland.
