Mahaut was the daughter of Arnaud de Mortagne and Yolande de Coucy. The date and place of her birth have not been found.
Her husband was Jean III de Lille. They were married, but the date and place have not been found. Their only known child was Jean IV (?-<1292).
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Arnaud de Mortagne |
Évrard IV Radoul |
Baudouin I van Doornick |
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Hildéarde de Wavrin |
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Enghelbert IV d'Enghien |
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Ide d'Avesnes |
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Thomas de Coucy |
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Mathilde de Rethel |
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