I came accross this family tree, looking for our relatives in Australia (as we lost track long time ago) and I have some additions if you are interested.Your grandfather Nicolaas Kwanten is my fathers brother, who is Henricus Cornelis Marie, born in Gennep on 22071907 and died in Well on 14031985. And my father was not the only brother, there was, as you said, Jan Hendrik (1901), Theodora (1903), Antonetta (1905), my father, Nicolaas, Frannciscus (1911) and Gertruda (1919) who is as far as I know, still alive. My name is Leonarda (born in 1949 in Well) and I know live in South Africa with my husband. My two children are still in Holland.
Pieter Jan Hubert, by the way, was born on 21011871 and died in 1946.
Where do you fit in??