Roy Family Genealogy
Family: William de Montagu / Katherine de Grandison (F6046)
m. 1327
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William de Montagu, Baron Montagu ( -1319)
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Elizabeth de Montfort ( -1345)
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| William de Grandison, Lord Grandison (1250-1335)
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| Sybil Tregoz (1271-1334)
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Agnes de Grandison (1288-1348)  |
| John de Grandison, Bishop of Exeter (1292-1369) |
| William de Montagu (1302-1343)
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| Katherine de Grandison (1304-1349)
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| John de Montagu ( -1389) |
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