Family: Guillaume I Count Joigny / Alix de Courtenay, Countess (F2235)
m. Abt 1178Pierre Emperor of Constantinople, Prince (1127-1183) 
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Isabelle Elizabeth de Courtenay (1148-1205)
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| Peter II de Courtenay (1155-1217) |
| Tochter de Courtenay (1158- ) |
Eustachia de Courtenay (1162-1236)  |
| Clementia de Courtenay (1164- ) |
| Robert de Courtenay (1166-1239) |
| Philippe de Courtenay (1168-1187) |
| Guillaume de Courtenay (1170-1234) |
| John de Courtenay (1172-1222) |
| Daughter de Courtenay (1174- ) |
| Constance de Courtenay (1176- ) |
| Guillaume I Count Joigny (1156-1219) |
| Alix de Courtenay, Countess (1160-1218)
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