The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Edmund Mortimer, m. Margaret Fiennes (1252-1304) |
 | Margaret Fiennes, m. Edmund Mortimer (1252-1334)
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| Margaret de Mortimer, de Berkeley (1308-1337)  |
| Katherine Mortimer, m. Thomas Beauchamp (1314-1369) |
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