MacLeod tradition is that Leod, who had possession of Harris and part of Skye, married a daughter of the Norse seneschal of Skye, MacArailt or Harold's son who held Dunvegan and much of Skye. Tradition stated that Leod's two sons, Tormod and Torquil, founded the two main branches of the Clan MacLeod, "Siol Tormod" and "Siol Torquil". Torquil was actually a grandson of Tormod; Torquil's descendants held the lands of the Isle of Lewis until the early seventeenth century when the Mackenzies successfully overthrew the Lewismen, partly with the aid of the Morrisons, and the MacLeods of Harris (Siol Tormod). Younger branches of Siol Torquil held the mainland lands of Assynt and Cadboll longer, and the Isle of Raasay until 1846. Siol Tormod held Harris and Glenelg on the mainland, and also the lands of Dunvegan on the Isle of Skye.