Abt 1031 - 1090 (59 years)
| 1st Earl of Cornwall & Montgomery de Conteville |
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| B: |
Abt 8 Dec 1031 |
| P: |
Mortagne-sur-Sèvre, Pays de la Loire, or Mortagne au Perche, OrneFrance |
| D: |
8 Dec 1090 |
| P: |
Mortain, Manche, Basse Normandie or Grestain, Fatouville-Grestain, Haute-Normandie, France |
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| Herluin Viscount of Conteville |
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| B: |
1001 |
| P: |
Conteville, Calvados, Basse-Normandie, France |
| M: |
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| P: |
France |
| D: |
1 May 1072 |
| P: |
Mortain, Manche, or Caen, Calvados, Basse-Normandie, France |
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| Herlève de Falaise |
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| B: |
Abt 1003 |
| P: |
Falaise, Calvados, Basse-Normandie, France |
| D: |
Abt 1050 |
| P: |
Caen, Calvados, Basse-Normandie or Grestain, Eure, Haute-Normandie, France |
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