| Birth |
Abt 1255 |
Cassington, Oxfordshire, England |
| Died |
27 Jun 1335 |
| Buried |
Dore Abbey |
| |
| Father |
Amadee Sire De Grandson, b. 1229, Neuchatel, Ne, Switzerland |
| Relationship |
Birth |
| Mother |
Benoite De La Tour, b. Gerenstein |
| Relationship |
Birth |
| Married |
Abt 1250 |
| |
| Family 1 |
Isabella, b. Yes, date unknown |
| |
| Family 2 |
Joan, b. Yes, date unknown |
| |
| Family 3 |
Sybil Tregoz, b. Abt 1263, Ewyas, Herefordshire, England |
| Married |
Abt 1285 |
Donyatt, Somersetshire, England |
| Children |
| | 1. Thomas Grandison, b. Abt 1285 |
| | 2. 2nd Baron Grandison Piers De Grandison, b. 1287, Ashperton, Herefordshire, England |
| | 3. Lady Agnes De Grandison, b. Abt 1289, Bletsoe, Bedfordshire, England |
| | 4. Mabilia De Grandison, b. Abt 1293, Ashperton, Herefordshire, England |
| | 5. Otes Grandison, b. Abt 1297, Salisbury, Wiltshire, England |
| | 6. John Grandison, 3rd Baron, b. 1299, Ashperton, Herefordshire, England |
| + | 7. Katherine De Grandison, b. Abt 1300, Ashford, Hertfordshire, England |
|
| |