Stephen Moore, 1st Earl Mount Cashell PC (25 July 1730 – 14 May 1790), styled The Honourable Stephen Moore between 1764 and 1766 and known as The Viscount Mount Cashell between 1766 and 1781, was an Irish landowner and politician.
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Early life
Moore was the second but eldest surviving son and heir of Stephen Moore, 1st Viscount Mount Cashell and the former Alicia Colvill. His elder brother, Richard Moore, who died unmarried in 1761, represented Clonmel in the Irish Parliament. His younger brother, William Moore represented Clogher, Clonmel and St Johnstown.
His paternal grandparents were Richard Moore of Cashell and the former Hon. Elizabeth Ponsonby (daughter of William Ponsonby, 1st Viscount Duncannon). His mother was the sister and heiress of Robert Colvill and daughter of Hugh Colvill (son and heir of Rt. Hon. Sir Robert Colvill of Newtown by his third wife Rose Leslie). Galgorm Castle near Ballymena passed by inheritance to Stephen from the Colvill family, who had bought it from the Fortescue family in the 1640s, and it became one of the family's principal residences.
Career
He was returned to the Irish House of Commons for Lismore, a seat he held until February 1766, when he succeeded his father in the viscountcy (only a month after his father was elevated to the viscountcy) and entered the Irish House of Lords. In 1781, he was created Earl Mount Cashell, of Cashell in the County of Tipperary, in the Irish peerage. In 1785, he was also sworn of the Irish Privy Council.