Nielsen Hayden genealogy
Family: Simon II de Dammartin / Marie of Ponthieu (F3037)
m. Sep 1208Aubrey II de Dammartin (1130-1200) 
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Mahaut of Clermont ( -1200)
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Juliane de Dammartin ( -1238)  |
| Agnès de Dammartin ( -1245) |
| William II Talvas (1171-1221)
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| Alix of France (1160-1218)
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| Simon II de Dammartin ( -1239)
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| Marie of Ponthieu (1199-1250)
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| Philippa de Dammartin ( -1277) |
| Jeanne de Dammartin (1220-1279) |