Willem Ferdinand Langerman

There is little evidence to date that Anna Catherina, Willem Ferdinand and Johannes (Jan) Louis Langerman were the "biological" children of Frederik Langerman SV/Prog. They were certainly the children of his stepdaughter Sara Maria Bruyns. It seems odd he would be having children with his wife and stepdaughter at the same time and it is possible he gave them his name. In one will with her husband (Mooc7-1-11ref 85-89) the three are referred to as her "natural" children. Frederik is however named as the father of Johannes (Jan) Langerman on his death certificate by his wife.