| Baldwin de Riviers Earl of Devon ( - 1155) |
Robert Count of Meulan ( - ca1207) |
| Adelise |
Maud de Dunstanville |
| William de Riviers (or Vernon) Earl of Devon | Mabel de Meulan |
| b. d. 10 Sep 1217 . 3rd s. 5th earl. Consistently supported K. John. |
b. d. aft 1204 . Heir. |
| Baldwin de Riviers (or Vernon) > Mary de Riviers (or Vernon) Countess of Devon < |