| b 1244, , , Of, Ingmanthorpe | d 28 May 1310, | |||
| Robert De_Roos | ||||
| | b 1177 | ||||
| William De_Roos | d 1226 | Henry Prince Of Earl_of | > | |
| |b 1203 | | | William I 'The_Lion' Scotland, [King] | Ada De Warenne_(Warren) | > |
| |d 1258 | Isabella Princess Of Scotland | b 1143 | ||
| | | b 1216 | |||
| William De Roos | d Oct1263 | |||
| |Eustache Gresley | |m 1268 | Piers Fitz Herbert | ||
| | | | | |||
| Lucy Fitz Piers | ||||
| | | ||||
| 1 | < | Lucy Roos |
Source: 'Ancestrial Roots of Sixty Colonists Who Came to New England between 1623 and 1650', Frederick Lewis Weis, 1969, p 112.