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Male Willem IV Count von Holland Click to view Willem IV Count von Holland in the family tree

Willem IV Count was born about 1317 in Of, Le Quesnoy, Nord, France.1   Willem IV Count's father was Willem III von Avesnes and his mother was Jeanne von Valois.  His paternal grandparents were Jean II von Avesnes and Philippina \Philippa Countess von Luxemburg-Maas; his maternal grandparents were Karl I Prinz von Frankreich and Marguerite Prinzessin von Sicily-Neapel. He had two brothers and six sisters, named Jan Count, Louis Count, Sibylla Countess, Margaretha Countess, Philippa Countess, Johanna Countess, Agnes Countess and Elisabeth Or.  He was the fourth youngest of the nine children.  He died on September 26th, 1345 in Worms, Friesland, Netherlands.1 

Family Details of Willem IV Count's family with Joanna Duchess von Brabant

1 World Family Tree Vol. 11, Ed. 1 @ Tree #3804

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