Father | MaleDE ROS, Baron Robert IV |
| Born | 1228 | West Riding, Yorkshire, England |
| Died | 20 Apr 1274 | Kirkham, Northumberland, England |
| Buried | ||
| Married | ||
| Other Spouse | BRUS, Margaret | F5635 | |
| Married | ||
| Father | DE ROS, Sir William 5th Baron Hamlake Knight Templar | F2400 Group Sheet | |
| Mother | FITZ PIERS, Lady Lucy Baroness De Ros | F2400 Group Sheet | |
Child 1 | MaleDEROS, William Ii 3Rd Earl |
| Born | 1250 | Wark On Tweed, Northumberland, England |
| Died | 9 May 1310 | Kendal Castle, Westmoreland, England |
| Buried | ||
| Spouse | DE VAUX, Baroness Maud | F487 | |
| Married | ||
| Spouse | OF GALLOWAY, Devorgilla | F488 | |
| Married | ||
Child 3 | FemaleDE ROS, Joan |
| Born | 1252 | Helmsley Castle, Yorkshire, England |
| Died | 13 Oct 1348 | Mitford, Suffolk, England |
| Buried |
Child 4 | FemaleDE ROS, Mary |
| Born | 1253 | Helmsley, Yorkshire, England |
| Died | 23 May 1326 | Bramber, Sussex, England |
| Buried |
Child 5 | FemaleDE ROS, Isabel |
| Born | 1256 | Yorkshire, England |
| Died | 1309 | East Riding, Yorkshire, England |
| Buried |
Child 6 | MaleDE COLVILLE, Sir Robert 2nd Baron Colville |
| Born | 1260 | Bytham Castle, Lincolnshire, England |
| Died | 6 Mar 1288 | Bytham Castle, Lincolnshire, England |
| Buried |
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