| Male Baron of Grandison William De Grandison |
| Birth | Abt 1255-1264 | Cassington, Oxfordshire, England, United Kingdom |
| Death | 27 Jun 1335 | Cassington, Oxfordshire, England, United Kingdom |
| Burial | ||
| Marriage | Abt 1286 | Donyatt, Somerset, England, United Kingdom |
| Father | Sire Amadeus De Grandison | F4366 Group Sheet | |
| Mother | Banoile De La Tour | F4366 Group Sheet | |
| Female Sybil Tregoz |
| Birth | 1271 | Ewyas Harold, Herefordshire, England, United Kingdom |
| Death | 12 Oct 1334 | |
| Burial | ||
| Father | Lord John De Tregoz | F4346 Group Sheet | |
| Mother | Mabel Fitz Warin | F4346 Group Sheet | |
| Female + Countess of Salisbury Katherine Degrandison |
| Birth | 1304 | Ewyas Harold, Herefordshire, England, United Kingdom |
| Death | 23 Nov 1349 | Bisham, Berkshire, England, United Kingdom |
| Burial | ||
| Spouse | William Demontagu | F4372 | |
| Marriage | 1327 | Cassington, Oxfordshire, England, United Kingdom |