Hi dear Vlasman,
I am afraid we are dealing with dates that are on the edge of being not publicly available due to privacy legislation here in The Netherlands... Tomorrow I will see if I can find anything. Maybe there is a population registration available, but I fear the worst. Do you have any idea when your g grandfather was born? That might help in finding his family.
I am afraid though that if he is born after 1920 there is nothing to be found, unless you know the names of his parents (your g g grandparents that is).