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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福島県 会津若松市 三伏甲の名字

About 50 【二瓶】5
About 30 【五十嵐】6
About 20 【鶴水】3
About 10 【奈良橋】4
About 10 【渡辺】7
Very rare 【遠藤】7
Very rare 【渡部】6