Jean was born about 1340, the son of Thierry V de Walcourt-Rochefort and Agnès de Warfusée. The place is not known.
He died after 1365. The place is not known.
His wife was Isabelle van Loon-Agimont. They were married, but the date and place have not been found. Their three known children were Jean II (?->1377), Marie (c1355-1402) and Rasso (?-?).
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Jean I de Walcourt-Rochefort |
Thierry V de Walcourt-Rochefort |
Thierry IV de Walcourt-Rochefort |
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Mathilde von Blankenheim |
Gerhard V von Blankenheim |
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Irmesinde de Durbuy |
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Agnès de Warfusée |
Jean de Warfusée |
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Adélaïs d'Ochain |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | ABT 1340 |
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| Death | AFT 1365 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | comte de Montaigu | |||||
| Nobility Title | seigneur de Rochefort |