Guillaume was born about 1210, the son of Guillaume II de Mont-Saint-Jean and Bure des Barres. The place is not known.
He died in 1256. The place is not known.
He had two marriages/partners. His first wife was Marguerite de Bourgogne, who he married in 1239. The place has not been found. They had no known children.
His second wife was Marie des Barres, who he married in BEF 1223. The place has not been found. They had no known children.
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Guillaume III de Mont Saint-Jean |
Guillaume II de Mont-Saint-Jean |
Hugues II de Mont-Saint-Jean |
Guy de Mont-Saint-Jean |
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NN de Saulx |
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Élisabeth de Vergy |
Hervé de Vergy |
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Bure des Barres |
Guillaume III des Barres |
Guillaume II (I) des Barres |
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Helissente de Chaumont |
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Amicie de Beaumont-le-Roger |
Robert III de Beaumont-le-Roger |
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Pernelle de Grandmesnil |
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1210 |
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| Death | 1256 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de Salmaise |