| Male FITZMARMADUKE John |
| Birth | Abt 1228 | Of Mitford, Northumberland, England  |
| Death | 1311 | |
| Burial | ||
| Marriage | Bef 8 May 1285 | Durham |
| Father | ||
| Mother | ||
| Female DE ROS Ida |
| Birth | Abt 1227 | Of, Mitford, Northumberland, England |
| Death | Aft 18 May 1315 | |
| Burial | ||
| Other Spouse | NEVILLE Robert | F1311 | |
| Marriage | 1251 | |
| Other Spouse | BERTRAM Roger | F1175 | |
| Marriage | Bef 3 May 1252 | Of, Mitford, Northumberland, England |
| Father | BERTRAM Robert, Baron of Mitford | F1176 Group Sheet | |
| Mother | Agnes | F1176 Group Sheet | |
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