Family: Baron John DE MOWBRAY / Elizabeth DE SEGRAVE (F4621)
Baron John DE MOWBRAY (1310-1361) 
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Joan PLANTAGENET (1310-1349)
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| Blanche DE MOWBRAY (1341- ) |
| Eleanor DE MOWBRAY (1342- ) |
| Baron John DE MOWBRAY (1340-1368)
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| Elizabeth DE SEGRAVE (1338- ) |