Duke of Portland
The
Duke of Portland is a
peerage title created in 1716 for Henry Bentinck, who was already Earl of Portland. The
dukedom came into the possession of the Cavendish-Bentinck family by marriage. The Dukedom of Portland became extinct on the 9th Duke's death, though the 9th Duke's distant cousin succeeded him as Earl of Portland.
Dukes of Portland (1716)