A genealogy of the Heath, Palmer, Thayer, Goodnow, and other allied families.
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 | Roger de Mortimer ( -1282)
|
 | Maud Matilda de Braose (1230-1301)
|
| Isabella de Mortimer ( -1274)  |
| Joanne de Mortimer ( -1337) |
| William Mortimer (1274-1296) |
| Roger Mortimer ( -1336) |
| William de Fiennes (1245-1302)
|
| Blanche de Brienne (1252-1302) |
| John Fiennes (1277- ) |
| Edmund de Mortimer (1252-1304)
|
| Margaret de Fiennes (1270-1333)
|
| Iseude Iswolde Isolt Mortimer ( -1337) |
| Maud de Mortimer (1286- ) |
| Roger Mortimer (1287-1330) |
| Hugh de Mortimer (1290- ) |
| Joan de Mortimer (1292- ) |
| Walter de Mortimer (1294- ) |
| Margaret Mortimer (1296- ) |
| Edmund de Mortimer (1298- ) |
| Matilda Mortimer (1298- ) |
| John de Mortimer (1300-1318) |
| Elizabeth Mortimer (1302- ) |
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