Nielsen Hayden genealogy
Family: William Marshal / Isabel de Clare (F5382)
m. Aug 1189John fitz Gilbert (1108-1165) 
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| Richard "Strongbow" fitz Gilbert (1130-1176)
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Eve of Leinster (1145-1186)
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| William Marshal (1146-1219)
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| Isabel de Clare (1173-1220)
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Eve Marshal ( -1242)  |
| Joan Marshal ( -1234) |
| Walter Marshal ( -1245) |
| William Marshal (1190-1231) |
| Maud Marshal (1192-1248) |
| Isabel Marshal (1200-1240) |
| Sybil Marshal (1204-1237) |