| Male William de Grandison, Lord Grandison |
| Birth | Abt 1250 | |
| Death | 27 Jun 1335 | England |
| Burial | ||
| Marriage | Apr 1267 to Feb 1268 [1] | |
| Other Spouse | Sybil Tregoz | F5565 | |
| Marriage | 21 Jan 1286/87 | |
| Father | Pierre, Sire de Grandison | F5566 Group Sheet | |
| Mother | Agnes de Neuchâtel | F5566 Group Sheet | |
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Sources 🟢 Primary Evidence 🟡 Secondary Evidence 🟠 Tertiary Evidence 🔴 Unreliable Evidence |
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