Duke of Southampton is a title in the Peerage of England. It was created in 1675 for Charles FitzRoy, an illegitimate son of King Charles II by his mistress, the 1st Duchess of Cleveland. Together with the dukedom, Charles Fitzroy also received the subsidiary titles of Earl of Chichester and Baron Newbury.
Upon his mother's death in 1709, the 1st Duke of Southampton succeeded to her hereditary peerages (the dukedom of Cleveland, earldom of Southampton and barony of Nonsuch). At his death in 1730, the titles passed to his son William. The 2nd Duke of Southampton died without issue, so the titles became extinct upon his death in 1774.
Dukes of Southampton (1675)
- Charles FitzRoy, 1st Duke of Southampton, 2nd Duke of Cleveland (1662–1730)
- William FitzRoy, 2nd Duke of Southampton, 3rd Duke of Cleveland (1698–1774)
|FitzRoy & Vane family tree: Dukes of Cleveland, Dukes of Southampton, and Earls of Darlington|
- "Charles Fitzroy, 1st duke of Southampton | Biography & Facts". Encyclopedia Britannica. Retrieved 15 July 2019.
- "Charles Fitzroy, Duke of Cleveland". Westminster Abbey. Retrieved 15 July 2019.
- Rapin de Thoyras, Paul (25 March 1747). The History of England. J. and P. Knapton. p. 152.