Willem was born about 1367, the son of Jan II van Petershem and Aleide van Heers. The place is not known.
He died before 1398. The place is not known.
He had two marriages/partners. His first wife was Maria van Boutershem, who he married on 29 JUL 1392. The place has not been found. Their only known child was Beatrix (c1393-1454).
His second wife was Johanna van Stavele. They were married, but the date and place have not been found. They had no known children.
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Willem IV van Petershem |
Jan II van Petershem |
Willem III van Pietersheim |
Jan I van Pietersheim |
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Elisabeth van Boxtel |
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Isabel van Leefdael-Grimbergen |
Rogier van Leefdael |
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Agnes van Kleef-Hülchrath |
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Aleide van Heers |
Gerhard van Heers |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | ABT 1367 |
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| Death | BEF 1398 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | heer van Petershem |