Abt 1249 - Bef 1322 (~ 73 years)
| Sir Robert de Grey | |
| B: | Abt 1333 |
| Ravensworth, Yorkshire, England | |
| D: | Bef 18 Oct 1367 |
| Rotherfield Peppard, Oxfordshire, Englandmap | |
| Lora St. Quintin | |
| B: | 1343 |
| Brandesburton, Yorkshire, England | |
| D: | 1369 |
| Brandesburton, Yorkshire, England | |
| John de Grey | |
| D: | 1385 |
| Elizabeth St. Quintin | |
| B: | 1341 |
| Avice Marmion | |
| B: | 1309 |
| West Tanfield, Yorkshire, England | |
| D: | Aft 20 Mar 1378 |
| Witney, Oxfordshire, England | |
| 2nd Baron Grey de Rotherfield John de Grey | |
| B: | 09 Oct 1300 |
| Rotherfield Grey, Oxfordshire, England | |
| D: | 01 Sep 1359 |
| Rotherfield Grey, Oxfordshire, England | |
| 4th Baron Marmion of Winteringham John Marmion | |
| B: | Abt 1292 |
| England | |
| D: | 30 Apr 1335 |
| England | |
| Maud de Furnival | |
| B: | Abt 1280 |
| England | |
| D: | Aft 1347 |
| England | |
|
| 3rd Baron Marmion of Winteringham Sir John Marmion | |
| B: | Abt 1249 |
| West Tanfield, Yorkshire, England | |
| D: | Bef 07 May 1322 |
| Wetherington, Lincolnshire, England | |
| Isabel Peck | |
| B: | Abt 1264 |
| England | |
| D: | 1337 |
| England | |
