I have a document of one of their children. On the document, his mothers names is Johanna Christina Otto and his dad was James Edward Fuller. Their origin - Orange River Colony, stated on his birth record. Their childs birth record is just shown as William Frederik Fuller (6/1/1910)...I think the Namibia is incorrect, family member made an error. Birth registered in Potchefstroom and that he was a grain farmer. No occupation for her.