Joan de Clare Peerage person ID=103030 (b. 1264) Parents Alice de Lusignan of Marche Gilbert de Clare, 7th Earl of Gloucester Children Isabella MacDuff, Countess of Buchan Donnchadh IV, Earl of Fife Siblings Margaret de Clare Elizabeth de Clare Gilbert de Clare, 8th Earl of Gloucester Eleanor de Clare Isabel de Clare Partners Donnchadh III, Earl of Fife