Maud had been co-heiress to vast estates and lordships in Ireland, Herefordshire, and the Welsh Marches, and the marriage is considered typical of Henry's 'policy' of appointing such 'aliens' to retain control of the outlying regions of the kingdom.

[1] Geoffrey thus came to control vast estates in Ireland centred at Trim, the Welsh borders at Ludlow, Ewyas Lacy and others in England.

[3] With another of his brothers, William, he accompanied Edward on the Eighth Crusade in 1270, fought in Welsh Wars, and went on diplomatic missions to Paris.

Edward appointed Geoffrey as Marshal of England in place of the main dissenter Roger Bigod, Earl of Norfolk until the crisis was over.

[3] In 1308, aged about eighty, he conveyed most, but not all, of his Irish lordships to Roger Mortimer, husband of his eldest granddaughter and heir, Joan.