Family: William de Ros, of Helmsley / Lady Lucy De FitzPiers (F13888)
m. 1225
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 | Sir Robert de Ros, I (1172-1227) |
 | Isabella Canmore (1165-1240) |
| Joan De Ros (1190- )  |
| Alexander de Ros, ,Knt, (1191-1305) |
| Lucy de Ros (1193-1279) |
| Sir Robert de Ros, Lord (1195-1269) |
| Peter de Ros ( -1265) |
| Peter Or Piers De Fitz Herbert (1166-1235) |
| Alice Lacy (1200-1224) |
| Reynald Piers (1207-1286) |
| William de Ros, of Helmsley (1192-1264)
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| Lady Lucy De FitzPiers (1204-1267)
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| Alice De Roos (1220-1286) |
| Robert de Ros (1223-1285) |
| Lucy De Ros (1225-1267) |
| Alexander de Ros (1231-1287) |
| Peter de Ros, Knt. (1233-1312) |
| Herbert De Ros (1234-1285) |
| John de Ros (1240- ) |
| Baron William de Ros, III (1244-1310) |
| William , of Ingmanthorp de Ros (1244-1310) |
| Anne Ros (1246-1290) |