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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秋田県 大館市 達子風呂添の名字

About 80 【羽沢】4
About 10 【羽澤】3
About 10 【渡辺】7
Very rare 【安部】6
Very rare 【小倉】6
Very rare 【羽柴】5
Very rare 【原田】7
Very rare 【渡部】6