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 | 6th Baron of Thirsk William de Mowbray (1173-1224)
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| William Beauchamp (1186- ) |
 | Ida Longesp (1199- )
|
| 6th Baron Mowbray Roger de Mowbray (1220-1266)
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| Maud Beauchamp (1229- )
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| 7th Baron Mowbray Roger de Mowbray (1254-1297)  |
