Mary Bruce Sister of Robert the Bruce (1280–1323) Parents Marjorie, Countess of Carrick Robert de Brus, 6th Lord of Annandale Children Duncan Campbell Macdonnachie of Inverawe Dougal Campbell John Fraser of Touchfraser Douglas Campbell John Campbell, Earl of Atholl William Fraser Siblings Isabel Bruce Alexander de Brus Robert I of Scotland Christina Bruce Thomas de Brus Elizabeth Bruce Nigel de Brus Edward Bruce Maud Bruce Margaret Bruce Isabel de Bruce Partners Alexander Fraser Niall mac Cailein