| 6th Baron Mowbray Roger de Mowbray | |
| B: | Abt May 1220 |
| Thirsk Castle, Thirsk, Yorkshire, England | |
| D: | 1266 |
| Yorkshire, England | |
| Maud Beauchamp | |
| B: | Abt 1229 |
| Bedford, Bedfordshire, England | |
| 6th Baron of Thirsk William de Mowbray | |
| B: | 1173 |
| Thirsk Castle, Thirsk, Yorkshire, England | |
| D: | 1224 |
| Isle of Axholme, Epworth, Lincolnshire, England | |
| Mabel de Clare | |
| B: | Abt 1150 |
| Tonbridge Castle, Tonbridge, Kent, England | |
| D: | 1204 |
