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
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愛知県 田原市 大草中半の名字

About 50 【寺田】6
About 10 【水野】6
Very rare 【河合】6
Very rare 【藤城】5
Very rare 【中濱】4
Very rare 【牧野】6