Arnaud was the son of Évrard IV Radoul and Isabelle d'Enghien. The date and place of his birth have not been found.
He died in 1226. The place is not known.
His wife was Yolande de Coucy. They were married, but the date and place have not been found. Their four known children were Mahaut (?-?), Jean (?->1278), Guillaume (?-?) and Marie (?-?).
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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 |
Jacques d'Avesnes |
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Adèle de Guise |
| Event | Date | Details | Source | Multimedia | Notes |
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| Death | 1226 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | FROM 1208 TO 1226 | châtelain de Tournai | ||||
| Nobility Title | seigneur de Mortagne |