Nielsen Hayden genealogy
Family: Gilbert "Strongbow" fitz Gilbert / Isabel de Beaumont (F5490)
Gilbert fitz Richard de Clare (1060-1117) 
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Alice de Clermont ( -1137)
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Baldwin fitz Gilbert ( -1155)  |
| Alice de Clare ( -1163) |
| Rohese fitz Gilbert ( -1165) |
| Margaret fitz Gilbert ( -1186) |
| Richard fitz Gilbert de Clare (1090-1136) |
| Robert of Meulan (1046-1118)
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| Isabel de Vermandois ( -1147)
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| Maud of Meulan ( -1190) |
| Waleran (1104-1166) |
| Robert of Meulan (1104-1168) |
| Gilbert "Strongbow" fitz Gilbert (1100-1148)
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| Isabel de Beaumont ( -1173)
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| Richard "Strongbow" fitz Gilbert (1130-1176) |