Ezra 2:35

Senaah. It is interesting to find at the close of all nonecclesiastical families and city groups the largest unit of all — 3,630 men — with the strange name “children of Senaah.” That this group is mentioned last may indicate that it was considered less important than the others. Because of its feminine ending the name has been thought to represent a town but that so large a town should have existed without ever being mentioned elsewhere would be most unusual. How could such a place have disappeared without leaving any trace of its former existence? For this reason some commentators consider it to be the name of a family unit. But if so, why should it be mentioned alone, at the end of a number of city groups, in spite of its great number? It therefore seems reasonable to consider that the 3,630 “children of Senaah” were a class of low-caste people, as Meyer and Kittel have suggested. The name Senaah appears also in variant forms in Neh. 11:9 and 1 Chron. 9:7.