Marquess of Dorset - Definition

The title Marquess of Dorset has been created three times in the Peerage of England. It was first created in 1397 for John Beaufort, 1st Earl of Somerset, but he lost the title two years later. It was then created in 1442 for Edmund Beaufort, 1st Earl of Dorset, who was created Duke of Somerset in 1448. That creation was attainted in 1463. It was created a third time in 1475 for Thomas Grey, 1st Earl of Huntingdon. That creation was attainted in 1554.

Marquesses of Dorset, first creation (1397)

• John Beaufort, 1st Marquess of Dorset (d. 1410) (degraded 1399)

Marquesses of Dorset, second creation (1442)

• see Duke of Somerset, second creation

Marquesses of Dorset, third creation (1475)

• Thomas Grey, 1st Marquess of Dorset (1451-1501)
• Thomas Grey, 2nd Marquess of Dorset (1477-1530)
• Henry Grey, 1st Duke of Suffolk (1517-1554) (created Duke of Suffolk 1551) (forfeit 1554)