William (III) 5th Earl of Ross ³

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  General Notes:

"Either at the death of Sir John Ross or of his widow, the lands passed to his nephew William, who became Earl of Ross in 1333."

from Scots Peerage ²

William married Mary MACDONALD, daughter of Angus Og MACDONALD of Kintyre, Lord of the Isles and Unknown, about 25 May 1342.¹ (Mary MACDONALD was born about 1312.)

  Marriage Notes:

"William, fifth Earl of Ross, married (in terms of Papal dispensation dated 25 May 1342) Mary, daughter of Angus Og, Lord of the Isles. He had issue ..."

from Scots Peerage ¹

William next married Isabella of Strathearn, heiress of Caithness, daughter of Malise (V) 8th Earl of Strathearn, 19th Earl of Orkney and Caithness and Marjorie ROSS, on 28 May 1344.² (Isabella of Strathearn, heiress of Caithness was born about 1327.)

  Marriage Notes:

"Isabella, declared by her father to be the heiress of the earldom of Caithness in a grant of her marriage on 28 May 1344 to William, Earl of Ross, her uncle."

from Scots Peerage vol 2 ²