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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岩手県 久慈市 大川目町第38地割の名字

About 20 【滝】6
About 20 【馬内】3
About 10 【川原】6
About 10 【清水】7
Very rare 【川向】5
Very rare 【下平】5
Very rare 【瀧】5
Very rare 【水堀】3