| Male William de Grandison, Lord Grandison |
| Birth | Abt 1250 | |
| Death | 27 Jun 1335 | England |
| Burial | ||
| Marriage | 21 Jan 1286/87 [1] | |
| Other Spouse | Jeanne | F8513 | |
| Marriage | Apr 1267 to Feb 1268 | |
| Father | Pierre, Sire de Grandison | F5566 Group Sheet | |
| Mother | Agnes de Neuchâtel | F5566 Group Sheet | |
| Female Sybil Tregoz |
| Birth | 1271 | Ewyas Harold, Herefordshire, England |
| Death | 12 Oct 1334 | England |
| Burial | ||
| Father | John de Tregoz | F5567 Group Sheet | |
| Mother | Mabel FitzWarin | F5567 Group Sheet | |
| Female Agnes de Grandison |
| Birth | 1288 to 1290 | |
| Death | 1348 | |
| Burial | ||
| Spouse | John de Northwode | F8514 | |
| Marriage | ||
| Female + Katherine de Grandison |
| Birth | Abt 1304 | Ashford, Kent, England |
| Death | 23 Nov 1349 | Bisham, Berkshire, England |
| Burial | ||
| Spouse | William de Montagu | F6046 | |
| Marriage | 1327 | England |
| Notes | Married:
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Sources 🟢 Primary Evidence 🟡 Secondary Evidence 🟠 Tertiary Evidence 🔴 Unreliable Evidence |
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