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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福岡県 八女市 柳瀬上柳瀬の名字

About 30 【松尾】6
About 10 【溝田】5
Very rare 【下津浦】3
Very rare 【高橋】7
Very rare 【竹島】5
Very rare 【平井】6