| 1. William Willoughby |
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| B: |
Abt 1305 |
| P: |
Erasby, Lincolnshire, England |
| D: |
Yes, date unknown |
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| 4. Sir William de Willoughby |
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| B: |
1240 |
| P: |
Willoughby, Lincolnshire, England |
| M: |
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| D: |
29 Mar 1300 |
| P: |
Spilsby, Lincolnshire, England, United Kingdom |
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| 3. Margaret Deincourt |
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| B: |
1275 |
| P: |
Blankney, Lincolnshire, England |
| D: |
18 Oct 1333 |
| P: |
Eresby, Lincolnshire, England |
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| 12. John D'Eincourt |
=> |
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| B: |
1225 |
| P: |
Blankney, Lincolnshire, England |
| M: |
Abt 1245 |
| P: |
Blankney, Lincolnshire, England |
| D: |
14 Oct 1257 |
| P: |
Blankney, Lincolnshire, England |
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| 13. Agnes De Neville |
=> |
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| B: |
Abt 1221 |
| P: |
Topcliffe, North Yorkshire, England |
| D: |
Abt 20 Jul 1293 |
| P: |
Blankney, Branston, Lincolnshire, England |
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| 7. Isabel De Mohun |
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| B: |
1243 |
| P: |
Dunster Castle, Somersetshire, England |
| D: |
Nov 1280 |
| P: |
Blankney, Lincolnshire, England |
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| 14. Sir Reginald De Mohun, II |
=> |
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| B: |
Apr 1206 |
| P: |
Dunster Castle, Dunster, Somerset, England |
| M: |
Abt 1243 |
| P: |
England, Unitd Kingdom |
| D: |
20 Jan 1258 |
| P: |
Tormohun, Devon |
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| 15. Isabel De Ferrers |
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| B: |
6 Apr 1226 |
| P: |
Derby, Derbyshire, England |
| D: |
26 Nov 1260 |
| P: |
Dunster, Somerset, England |
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Abt 1305 - Yes, date unknown
