1170 - 1226 (56 years)
 | 1st Baron de Ros Sir Robert de Ros 1265-1361 |
| 1st Baron de Ros Sir Robert de Ros | |
| B: | 1265 |
| Yorkshire, England | |
| D: | 3 Feb 1361 |
| Lincolnshire, England | |
 | Emberge de ros 1280- |
| Emberge de ros | |
| B: | 1280 |
| Gedney, Lincolnshire, England | |
| M: | 1299 |
| Gedney, Lincolnshire, England | |
| 2nd Baron of Hamlake William de Ros 1244-1316 |
| 2nd Baron of Hamlake William de Ros | |
| B: | 27 Jun 1244 |
| Helmsley, Yorkshire, England | |
| D: | 16 Aug 1316 |
| Youlton, Yorkshire, England | |
 | Maud de Vaux 1261-1312 |
| Maud de Vaux | |
| B: | 1261 |
| Freiston, Lincolnshire, England | |
| M: | Bef 1287 |
| D: | 1312 |
| Youlton, Yorkshire, England | |
| Sir Robert de Ros 1223-1285 |
| Sir Robert de Ros | |
| B: | 3 Mar 1223 |
| Yorkshire, England | |
| D: | 17 May 1285 |
| Leicestershire, England | |
| Isabel d'Aubeney 1233-1301 |
| Isabel d'Aubeney | |
| B: | 1233 |
| Leicestershire, England | |
| D: | 15 Jun 1301 |
| Gedling, Nottinghamshire, England | |
| Sir William de Ros 1192-1264 |
| Sir William de Ros | |
| B: | 1192 |
| Helmsley, Yorkshire, England | |
| D: | 1264 |
| Yorkshire, England | |
| Lucy FitzPeter 1205-1266 |
| Lucy FitzPeter | |
| B: | 1205 |
| Breconshire, Wales | |
| D: | 1266 |
|
| Baron of Helmsley Robert de Ros 1170-1226 |
| Baron of Helmsley Robert de Ros | |
| B: | 1170 |
| D: | 23 Dec 1226 |
| Isabella Mac William 1175-1226 |
| Isabella Mac William | |
| B: | 1175 |
| Haddington, East Lothian, Scotland | |
| D: | 23 Dec 1226 |
| London, England | |
We make every effort to document our research. There is a lot of information that I do not have, and I know there are mistakes in this tree. My feelings will not be hurt if you give me corrections or additional information, especially if you can provide sources for the information.
