Nielsen Hayden genealogy
Family: Robert I de Courtenay / Mahaut de Méhun-sur-Yévre (F14705)
m. Between 1216 and 10 Dec 1218
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Pierre of France (1121-1180)
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Elisabeth de Courtenay ( -1206)
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Peter II of Courtenay, Emperor of Constantinople (1155-1217)  |
| Alix de Courtenay (1160-1218) |
| Constance de Courtenay (1174-1232) |
| Robert I de Courtenay (1168-1239)
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| Mahaut de Méhun-sur-Yévre ( -1240)
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| Pierre I de Courtenay (1218-1250) |