The Dukedom of Berwick-upon-Tweed, from Berwick-upon-Tweed in England by the border with Scotland, was created in 1687 for James FitzJames, the illegitimate son of King James II of England. The title, and its subsidiary titles (Baron Bosworth and Earl of Tinmouth) are generally considered to have been forfeit when the Duke was attainted following the deposition of his father. However, some have argued that the forfeiture was never properly carried out, and that the title thus remains extant, in the hands of the Spanish Duque de Penaranda.

Dukes of Berwick-upon-Tweed (1687)

• James FitzJames, 1st Duke of Berwick-upon-Tweed (1670-1734) (forfeit 1695)

Possible de jure Dukes of Berwick

• Jacopo Fitzjames-Stuart, 2nd Duke of Berwick, 1st Duque de Liria y Xérica (1718-1785)
• Carlos Fitzjames-Stuart, 3rd Duke of Berwick, 2nd Duque de Liria y Xérica (1752-1787)
• Jacopo Fitzjames-Stuart, 4th Duke of Berwick, 3rd Duque de Liria y Xérica (1773-1794)
• Jacopo Fitzjames-Stuart, 5th Duke of Berwick, 4th Duque de Liria y Xérica (1792-1795)
• Carlos Fitzjames-Stuart, 6th Duke of Berwick, 5th Duque de Liria y Xérica, 14th Duque de Alba de Tormes (1794-1835)
• Jacopo Fitzjames-Stuart, 7th Duke of Berwick, 15th Duque de Alba de Tormes (1821-1881)
• Carlos Fitzjames-Stuart, 8th Duke of Berwick, 16th Duque de Alba de Tormes (1849-1901)
• Jacopo Fitzjames-Stuart, 9th Duke of Berwick, 17th Duque de Alba de Tormes (1878-1953)
• Hernando Fitzjames-Stuart, 10th Duke of Berwick, 16th Duque de Penaranda (b.1922)