World of HYDE
Discovering our Ancestors and their descendants to all parts of the world. Last updated 15th March 2026.
Family: Baron Piers De Grandison / Blanche De Mortimer (F9527)
m. Bef 20 Jun 1330
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 | Guillaume De Grandison (1253-1335)
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 | Sibyl De Tregoz (1271-1334)
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| Thomas De Grandison (1285-1317) |
| Agnes De Grandison (1289-1357)  |
| Mabilia De Grandison (1294-1349) |
| William De Grandison (1294-1330) |
| Otto De Grandison (1296-1359) |
| Bishop Of Exeter John De Grandison (1299-1369) |
| Clarice Grandison (1300- ) |
| Matilda De Grandison (1301-1359) |
| Catherine De Grandison, Countess Of Salisbury (1304-1349) |
| Roger De Mortimer, 3rd Baron Mortimer (1287-1330)
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| Baroness Joan De Geneville (1285-1356)
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| Margaret De Mortimer, Baroness Berkeley (1304-1337) |
| Joan De Mortimer (1306-1361) |
| Baron Mortimer Edmund De Mortimer (1306-1331) |
| Roger De Mortimer (1309-1338) |
| Katherine De Mortimer, Countess Of Warwick (1313-1369) |
| Agnes De Mortimer (1314-1368) |
| Maud De Mortimer (1315-1345) |
| Geoffrey De Mortimer (1318-1372) |
| Beatrice De Mortimer (1322-1383) |
| Matilda De Mortimer (1328- ) |
| Baron Piers De Grandison (1297-1358)
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| Blanche De Mortimer (1313-1347)
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| Katherine Grandison (1326- ) |
| John De Grandison (1331- ) |
| Isabell De Grandison (1334-1406) |
| Agnes Grandison (1334- ) |
| Otho Grandison (1335-1357) |
| Mabel De Grandison (1336- ) |
| Elizabeth Grandison (1339- ) |
| Jean Degrandison (1342-1396) |