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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茨城県 つくばみらい市 十和の名字

About 30 【小菅】6
About 20 【亀田】6
About 10 【吉田】7
About 10 【坂野】6
About 10 【瀬川】6
Very rare 【寺田】6
Very rare 【野口】6