| Thomas Cogan(1286 - 1314) | Baron William DeMontagu (or Montacute)(~1275 - 1319) |
| Petronilla(~1286 - ) | Elizabeth DeMontfort(~1275 - 1345) |
| Richard DeCogan | Mary DeMontagu (or Montacute) |
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b. 9 Oct 1299, Bampton, Devonshire, England
d. 20 Apr 1368, Bampton, Devonshire, England, age: 68
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b. 1313, Salisbury, Wiltshire, England
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| William Cogan |