Nielsen Hayden genealogy
Robert I de Pierrepont
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Name Robert I de Pierrepont Gender Male Death Abt 1209 [1] Person ID I46779 Ancestry of PNH, TNH, and others | Ancestor of GR, Ancestor of KL Last Modified 12 Jun 2026
Family 
Eustachie de Roucy d. Abt 1211 Children + 1. Jean II de Roucy d. 1251, Flanders 
Family ID F27154 Group Sheet | Family Chart Last Modified 12 Jun 2026
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Notes - Sire de Pierrepont.
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Sources - [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler.
- [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler.