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.
A descendant of his inherited the title of Duke of Roxburghe, and subsequently, the Lordship and Barony of Halydean were granted to a member of Clan Moffat in keeping with Scotland's customary practices.