My father has just passed away recently and I was looking through his family tree.I see that I have five more first cousins possibly living in Holland.Their father's name is Johannes (a.k.a. Joop) Faber and their mother's name is Catharina (nee Biesot).
The children that they had bared are:
Wilhemina Hendrica Ida Johanna Wilhemus Frederikus Anna Jozephina Ronald
I know that this is a needle in the haystack, but anything can happen.