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 一宮市 上祖父江北外山の名字

About 10 【秋江】4
About 10 【天野】6
About 10 【渡辺】7
Very rare 【岩原】5
Very rare 【内田】7
Very rare 【大脇】5
Very rare 【加藤】7
Very rare 【国島】5
Very rare 【沢江】4
Very rare 【藤戸】5