| Male Sir William de Roos, of Helmesley |
| Birth | Bef 1200 | |
| Death | Between 1258 and 1264 | |
| Burial | ||
| Marriage | Bef 24 Jan 1234 [1] | |
| Father | Robert de Roos | F1386 Group Sheet | |
| Mother | Isabel MacWilliam | F1386 Group Sheet | |
| Female Lucy FitzPeter |
| Birth | ||
| Death | 1266 | |
| Burial | ||
| Father | Peter FitzHerbert, of Blaen Llynfi | F1384 Group Sheet | |
| Mother | Alice FitzRoger | F1384 Group Sheet | |
| Female Alice de Roos |
| Birth | ||
| Death | Abt Apr 1286 | |
| Burial | ||
| Spouse | Sir John Comyn, of Badenoch | F1381 | |
| Marriage | Abt 1260 | |
| Sources |
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