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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石川県 鳳珠郡能登町 天坂甲の名字

About 10 【安多】3
Very rare 【兄後】2
Very rare 【狭間】5
Very rare 【山瀬】5
Very rare 【山森】5