Jan can not be the same person as JanJanssen. JanJanssen marries Fenneke in 1709, Jan Jansen Janmaat has son in 1738, wife Fenneke would be almost 50.
Is Jan the same person as JanJanssenvan de kleineElhorst? JanJanssenvan de kleineElhorst marries Fenneke Hendrix in 1727, Jan Jansen Janmaat has a son Jannes in 1738, mother is Fenneke Knoef.
Jan can not be the same person as Janvan hetJanmaat. Janvan hetJanmaat marries Anna in 1738, Jan Jansen Janmaat has Jannes in 1738, mother Fenneke.