Guillaume was born about 1030, the son of unknown parents. The place is not known.
He died in 1059. The place is not known.
His wife is not known. They were married, but the date and place have not been found. Their only known child was Guillaume II (c1055-1097).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1030 |
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| Death | 1059 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de Millescu-en-Aunis |