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Male Willem de Cock van Isendoorn Click to view Willem de Cock van Isendoorn in the family tree Click to view Willem de Cock van Isendoorn in the family tree

1  Willem's father was Willem de Cock van Weerdenburch and his mother was Mabelia van Arkel.  His paternal grandparents were Rudolf II de Cock van Weerdenburch and Margriet van Batenburg.  He was an only child.

Family Details of Willem's family with Arnolda van Keppel


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