Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
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新潟県 新発田市 岡田の名字

About 60 【今井】7
About 50 【藤倉】5
About 40 【肥田野】4
About 30 【羽賀】5
About 30 【渋谷】6
About 30 【相馬】6
About 30 【荒井】6
About 20 【黒崎】6
About 20 【長谷川】7
About 10 【天城】4
About 10 【伊藤】7
About 10 【神田】6
About 10 【京野】4
About 10 【熊谷】6
About 10 【高山】6
About 10 【後藤】7
About 10 【高沢】5
Very rare 【藍川】3
Very rare 【青山】6
Very rare 【阿部】7
Very rare 【五十嵐】6
Very rare 【池田】7
Very rare 【吉田】7
Very rare 【佐藤】7
Very rare 【築井】4
Very rare 【富樫】6
Very rare 【原】7
Very rare 【森塚】4
Very rare 【山田】7