Isabel de Bruce Peerage person ID=857 Parents Robert de Brus, 5th Lord of Annandale Robert de Brus, 6th Lord of Annandale Children Agnes Bertram Mary FitzMarmaduke Siblings William de Brus John de Brus Euphemia Bruce Richard de Brus Christina Bruce Isabel Bruce Alexander de Brus Mary Bruce Robert I of Scotland Margaret Bruce Maud Bruce Edward Bruce Nigel de Brus Elizabeth Bruce Thomas de Brus Partners Sir John FitzMarmaduke Robert I de Neville Sir Roger Bertram