| Type | Valeur |
|---|
| Dugdale’s the Baronage of England, pg. 106-108 |
| Eustace FitzJohn, Richard FitzEustace, Roger FitzRichard, Robert FitzRoger, John FitzRobert and Roger FitzJohn de Clavering in Dugdale’s the Baronage of England, pg. 106-108 [See document in the Memories section] |