Nielsen Hayden genealogy
Family: Baderon de Monmouth / Rohese fitz Gilbert (F4070)
William de Monmouth (1060-1137) 
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| 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) |
| Margaret fitz Gilbert ( -1186) |
| Richard fitz Gilbert de Clare (1090-1136) |
| Gilbert "Strongbow" fitz Gilbert (1100-1148) |
| Baderon de Monmouth (1100-1170)
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| Rohese fitz Gilbert ( -1165)
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| Rohese de Monmouth (1135-1180) |