Nielsen Hayden genealogy
Family: Roger de Lacy / Maud de Clare (F1568)
John fitz Richard (1145-1190) 
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Alice fitz Roger ( -1191)
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| Richard de Clare (1153-1217)
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| Amice of Gloucester ( -1225)
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Hawise de Clare ( -1235)  |
| Gilbert de Clare (1180-1230) |
| Roger de Lacy (1165-1211)
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| Maud de Clare ( -1213)
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| John de Lacy (1192-1240) |