| 1. Robert De LACY |
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| B: |
20 May 1070 |
| P: |
Halton, Cheshire, England |
| D: |
19 Jun 1149 |
| P: |
Pontrefact, Yorkshire, England |
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| 2. Ilbert DE LACY, I |
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| B: |
1045 |
| P: |
Lacy, Normandy, France |
| M: |
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| P: |
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| D: |
1093 |
| P: |
Pontefract, Yorkshire, England |
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| 4. Hugh DELACY |
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| B: |
1018 |
| P: |
Normandy, France |
| M: |
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| P: |
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| D: |
1049 |
| P: |
France |
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| 8. |
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1070 - 1149 (79 years)