Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
https://play.google.com/store/apps/details?id=info.jigensha.jcedfreeGoogle Play で手に入れよう https://apps.apple.com/us/app/id1471109324
↑オフライン検索できるアプリもどうぞ

愛知県 愛西市 下東川中山の名字

About 50 【横井】6
About 20 【飯尾】5
About 20 【石垣】6
About 10 【渡辺】7
Very rare 【渡邊】6