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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福島県 南会津郡下郷町 高陦上居平乙の名字

About 90 【五十嵐】6
Very rare 【児山】5
Very rare 【星】6