Thomas Eustace, 1st Viscount Baltinglass

Thomas Eustace, 1st Viscount Baltinglass (c.1480-1549) was an Anglo-Irish noble who achieved wealth and influence by prudently remaining loyal to the English Crown. He was born circa 1480 at Caslemartin, County Kildare.

He was the son of Richard Eustace (died before 1496), younger son of Sir Edward FitzEustace, Lord Deputy of Ireland, and Anne, daughter of Robert Eustace of Ballyloughrane. He married Margaret Talbot, daughter of Sir Peter Talbot of Malahide Castle and Catherine FitzGerald. He died on 31 July 1549.

On 14 December 1496, when only sixteen, he succeeded his uncle, Rowland FitzEustace, 1st Baron Portlester, in the family estates. Portlester's daughter Alison married Gerald FitzGerald, 8th Earl of Kildare and was the grandmother of Silken Thomas, hence the strong pressure on the Eustace clan to join Thomas' rebellion.

He was High Sheriff of Kildare in 1523 and was knighted, but little else is known of him until about 1534.

During the Silken Thomas rebellion, when the Eustace family were deeply divided, due to the close family tie between the Eustace and Fitzgerald families, he remained loyal to Henry VIII and was duly rewarded for his assistance in putting down the rebellion by being created Baron Kilcullen in the Peerage of Ireland in September 1535. He is said to have possessed one half of County Wicklow, together with his family's existing possessions in Kildare and County Meath, and benefited from the Dissolution of the Monasteries.

He played a prominent part in the Irish Parliament of 1541-2. The Parliament is chiefly remembered for passing the Crown of Ireland Act 1542 by which Henry VIII took the title King of Ireland, in preference to the earlier Lordship of Ireland.

...
Wikipedia