Family: de Mortimer, Baron Edmund I / de Fiennes, Margaret (F14201)
m. Sep 1285Drag or scroll to see more of the chart.
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 | de Mortimer, Baron Roger (1231-1282)
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 | de Braose, Maud (1224-1301)
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 | de Mortimer, Countess Isabella (1248-1300)  |
| de Fiennes, Lord William (1252-1302) |
| de Brienne, Blanche (1252-1302) |
| de Mortimer, Baron Edmund I (1252-1304)
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| de Fiennes, Margaret (1269-1334)
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| de Mortimer, Roger (1287-1330) |