 He had already created Baron Kilcullen, in the County of Kildare, in September 1535, also in the Peerage of Ireland.Lord Baltinglass was the nephew and heir of Rowland FitzEustace, 1st Baron Portlester, who died without legitimate male issue.His grandson, the third Viscount, took part in the Desmond Rebellion of 1581 and was attainted in 1585 with his titles forfeited.