One of his heirs became the Duke of Roxburghe, and eventually the Lordship and Barony of Halydean were assigned in the traditional Scottish manner to a member of Clan Moffat, another Scottish border clan.
One of his heirs succeeded as the Duke of Roxburghe, and subsequently, the Lordship and Barony of Halydean were bestowed upon a member of Clan Moffat in accordance with traditional Scottish customs.