The Duke of Somerset | |
| Succession: | Duke of Somerset |
| Reign: | 1660–1671 |
| Reign-Type: | Tenure |
| Predecessor: | William Seymour |
| Successor: | John Seymour |
| Birth Name: | William Seymour |
| Birth Date: | 17 April 1652 |
| Father: | Henry Seymour, Lord Beauchamp |
| Mother: | Mary Capell |
William Seymour, 3rd Duke of Somerset (17 April 165212 December 1671) was the son of Henry Seymour, Lord Beauchamp, and Mary Capell. As both his father and two elder uncles had predeceased him, he succeeded to the dukedom on the death of his grandfather William Seymour.[1]
He died in 1671, unmarried and childless and was succeeded by his paternal uncle John Seymour.[1]