| Male William De Ross |
| Birth | 1196 | Helmsley, Yorkshire, England, United Kingdom |
| Death | 1246 | |
| Burial | ||
| Marriage | ||
| Father | Baron of Hemsley Robert De Ross | F2192 Group Sheet | |
| Mother | Isabella Canmore | F2192 Group Sheet | |
| Female Lucia Fitz Piers |
| Birth | 1250 | Forest of Dean, Coleford, Gloucestershire, England, United Kingdom |
| Death | Yes, date unknown | |
| Burial | ||
| Father | ||
| Mother | ||
| Male + William De Ross |
| Birth | 1244 | Ingmanthorpe, England, United Kingdom |
| Death | 28 May 1310 | |
| Burial | Grey Friars Church, Greenwich, Kent, England, United Kingdom |
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| Spouse | Eustance Fitz Hugh | F2190 | |
| Marriage | ||