Margaret de Clare English noble (1292–1342) Parents Joan of Acre Gilbert de Clare, 7th Earl of Gloucester Children Margaret de Audley Siblings Eleanor de Clare Mary de Monthermer Joan de Clare Gilbert de Clare, 8th Earl of Gloucester Elizabeth de Clare Edward de Monthermer, 3rd Baron Monthermer Joan de Monthermer Thomas de Monthermer, 2nd Baron de Monthermer Isabel de Clare Partners Hugh de Audley, 1st Earl of Gloucester Piers Gaveston, 1st Earl of Cornwall