Willem was the son of Jan (Joannes) (Voozent) Voorend and Gerrigje (van de) Kleij. The date and place of his birth have not been found.
He has died but the date and place are unknown.
His wife was Marrigje (Marrina) van der Kleij. They were married, but the date and place have not been found. Their two known children were Johannes (Voorend) (1780-?) and Marrigje (Voorend) (1787-?).
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