Gervais was the son of Gervais and Ermengarde de Roucy. The date and place of his birth have not been found.
His wife was Helvide de Rumigny. They were married, but the date and place have not been found. They had no known children.
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Èbles II de Montdidier |
Hilduin IV de Montdidier |
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Alix de Roucy |
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Robert Guiscard de Hauteville |
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Sikelgaita de Salerne |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | prince de Galilée |