Guglielmo was the son of Antonio I d'Arco but his mother is unknown. The date and place of his birth have not been found.
He died after 1405. The place is not known.
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Guglielmo d'Arco |
Antonio I d'Arco |
Niccolò d'Arco |
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Beatrice di Castelbarco |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | AFT 1405 |
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