 Male6th Baron of Thirsk William de Mowbray |
| Birth | 1173 | Thirsk Castle, Thirsk, Yorkshire, England  |
| Death | 1224 | Isle of Axholme, Epworth, Lincolnshire, England |
| Burial | 1224 | Furness Abbey, Dalton-in-Furness, Cumbria, England |
| Marriage | ||
| Father | 5th Baron Thirs Nigel de Mowbray | F4917 Group Sheet | |
| Mother | Mabel de Clare | F4917 Group Sheet | |
 FemaleAvice d'Aubigny |
| Birth | Arundel Castle, Arundel, Sussex, England |
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| Death | ||
| Burial | ||
| Father | 3rd Earl of Arundel William d'Aubigny | F4414 Group Sheet | |
| Mother | Mabel of Chester | F4414 Group Sheet | |
| Male + 6th Baron Mowbray Roger de Mowbray |
| Birth | Abt May 1220 | Thirsk Castle, Thirsk, Yorkshire, England |
| Death | 1266 | Yorkshire, England |
| Burial | ||
| Spouse | Maud Beauchamp | F4517 | |
| Marriage | ||
| Male 5th Baron Mowbray Nigel de Mowbray |
| Birth | Thirsk Castle, Thirsk, Yorkshire, England |
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| Death | ||
| Burial | ||
| Spouse | Mathilda de Camvile | F4920 | |
| Marriage | ||
