Eustache was the daughter of Robert III de Wavrin and Marie d'Arleux. The date and place of her birth have not been found.
Her husband was Thierry de Saint Omer. They were married, but the date and place have not been found. Their only known child was Jean (?-?).
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Robert III de Wavrin |
Robert II de Beaumont-Beaussart |
Robert I Brunel de Wavrin |
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Marie de Roye |
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