Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
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長野県 佐久市 田口下町の名字

About 70 【大工原】4
About 60 【中条】5
About 40 【土屋】6
About 30 【丸山】7
About 20 【小林】7
About 20 【細谷】6
About 10 【青木】7
About 10 【井出】6
About 10 【大井】6
About 10 【鷲見】5
About 10 【竹内】7
About 10 【萩原】6
About 10 【木根渕】3
About 10 【篠原】6
About 10 【鈴木】7
About 10 【高橋】7
About 10 【田中】7
About 10 【堀籠】5
About 10 【渡辺】7
Very rare 【相馬】6
Very rare 【甘木】3
Very rare 【伊藤】7
Very rare 【岩田】6
Very rare 【臼田】5
Very rare 【江沢】5
Very rare 【小日向】5
Very rare 【加藤】7
Very rare 【金子】7
Very rare 【神保】5
Very rare 【北村】6
Very rare 【清水】7
Very rare 【佐藤】7
Very rare 【三瓶】5
Very rare 【志摩】5
Very rare 【中條】5
Very rare 【西沢】6
Very rare 【畠山】6
Very rare 【布施】6
Very rare 【松本】7
Very rare 【宮入】5