Zaandam (Dutch) comes from Dutch zaan, from Middle Dutch saen, from Old Dutch sān, from Proto-West Germanic sān(ō), from Proto-Germanic sēna, from Proto-Germanic *sa, from Proto-Austronesian *əsa, from Proto-Oceanic *isa.
Ancestry of “Zaandam”, step by step
Zaandam traces back through two separate lines of ancestry.