Eustache was the son of Hugues I de Saint-Pôl and Clémence de Saint-Pôl. The date and place of his birth have not been found.
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Hugues I de Saint-Pôl |
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Rudiger |
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Hatwide |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | comte de Saint-Pôl |