I could use some help determining which of two conflicting patronymics provides the given name of a DE BEER ancestor.
Normally, I would conclude that Jacob Simon's father was Moscheh.
However, Jacob's descendants were very consistent in the naming pattern they used; in every generation, the sons used their father's given name as their middle name. So Simon Jacob, born 1747, named one of his sons Jacob Simon (1774); who named one of his sons Simon Jacob (1808), who named one of his sons Jacob Simon (1853). Presumably, the "bar" was implicit in this patronymic naming scheme.
If the family naming pattern were decisive here, then the original Jacob Simon's father would be Simon.
If, however, "bar Moschech" were determinative, then Jacob Simon's father was named Moscheh.
I'm hoping someone who has some knowledge of naming customs in Amsterdam around the turn of the 18th century can give me some direction.
Thanks very much.