Guillaume was the son of Pierre II (III) des Barres and NN de la Guerche. The date and place of his birth have not been found.
He died in 1244. The place is not known.
His wife was Agnes de la Guerche, who he married in BEF 1222. The place has not been found. They had no known children.
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Guillaume de la Guerche |
Pierre II (III) des Barres |
Guillaume II (I) des Barres |
Guillaume I des Barres |
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Helissente de Chaumont |
Galéran de Chaumont |
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Ermesinde de Sens |
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NN de la Guerche |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | 1244 |
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