Mabel married Amaury III, Count of Évreux, and Amice became the wife of Richard de Clare, 3rd Earl of Hertford After a series of disputes between Isabella's father William, Earl of Gloucester and Henry II, in September 1176, William attempted to regain favour with the King and secure the future of the earldom.
In a politically difficult position, William agreed to a betrothal between Isabella, and John, Henry and Eleanor of Aquitaine's youngest son.
[2] Earl William died in 1183, at which point Henry II nominated Isabella as the sole heir to the earldom, and made her his ward.
Wardship meant that Henry completely controlled her lands, revenues and resources, and while he could have married her to John, he chose to keep Isabella's holdings for himself.
[8] Isabella died in October 1217, just a month after her third marriage, probably at Keynsham Abbey in Somerset, which had been founded by her father in memory of her brother, Robert.