| James Berkeley Lord Berkeley |
Thomas Strangeways |
| Isabella Mowbray |
Catherine Neville |
| Sir William I Berkeley Marquess of Berkeley | Joan Strangeways |
| b. 1426, Berkeley castle d. 14 Feb 1492, The Sanctuary at Westminster . 1st s. dsps. 1st marquess: 1489. Regained estate by mortal combat. Earl Marshal. |
b. d. 24 Feb 1485 . Co-heir (?). |
| Spouses: 1, 2, 3 | Spouses: 1, 2 |
| Thomas Berkeley Katharine Berkeley |