Richard de Clare, 6th Earl of Gloucester English nobleman (1222-1262) (1222–1262) Parents Isabel Marshal Gilbert de Clare, 5th Earl of Gloucester Children Lady Isabel de Clare Gilbert de Clare, 7th Earl of Gloucester Rohese de Clare Margaret de Clare Thomas de Clare, Lord of Thomond Bogo de Clare Siblings Isabella of Gloucester and Hertford Henry of Almain Amice de Clare Agnes de Clare Gilbert de Clare Isabella of Cornwall John of Cornwall Nicholas of Cornwall William de Clare Partners Maud de Lacy, Countess of Gloucester Margaret de Burgh