Biography
Catherine Seymour was born circa 1693 to Charles Seymour, 6th Duke of Somerset (1662-1748) and Elizabeth Percy (1667-1722) and died 9 April 1731 of unspecified causes. She married William Wyndham (1687-1740) 15 July 1708 .
Children
| Name | Birth | Death | Joined with |
| Charles Wyndham, 2nd Earl of Egremont (1710-1763) | 19 August 1710 | 21 August 1763 | Alicia Maria Carpenter (c1726-1794) |
| Elizabeth Wyndham (bef1731-1769) | 1731 | 5 December 1769 | George Grenville (1712-1770) |
| Percy Wyndham, 1st Earl of Thomond (c1723-1774) | |||
Footnotes (including sources)
| ‡ General |
|