Ancestry Research in the United Kingdom
- 1236
| 1st Baron Ros of Helmsley William de Ros Abt 1255-1316 |
| 1st Baron Ros of Helmsley William de Ros | |
| B: | Abt 1255 |
| D: | Between 06 and 08 Aug 1316 |
 | Isabel d'Aubigny Abt 1233-1301 |
| Isabel d'Aubigny | |
| B: | Abt 1233 |
| D: | 15 Jun 1301 |
| Robert de Ros -1285 |
| Robert de Ros | |
| D: | 17 May 1285 |
|
| William d'Aubigny -1236 |
| William d'Aubigny | |
| D: | 01 May 1236 |
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