Currently we don't know who the father of Johannes Oosthuysen, SV/PROG
Some think it is Johannes Oosthuijsz (born 1645 Amsterdam, died 1675 Amsterdam) with a son Johannes Oosthuysen (born 1672 in Amsterdam). (this son of 1672 has currently now also been added here Johannes Oosthuysen ). This is highly unlikely that he had another son Johannes born in 1665 in Weert. Normally in The Netherlands, when a family has a second child with the same this meant that the first child had died young.
(Changing the son from being born in 1665 in Weert to being born in 1672 in Amsterdam doesn't solve it either because that would mean that the son migrated at 13 years old in 1685 to South Africa.)
Currently someone changed his name to "Johannes" but without adding any sources or references. So for the time being I change the name back to "NN".