Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
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長野県 諏訪郡原村 柏木の名字

About 400 【清水】7
About 90 【小林】7
About 70 【荒木】6
About 50 【林】7
About 50 【中村】7
About 40 【五味】5
About 40 【津金】5
About 40 【堀内】6
About 40 【長林】3
About 30 【上島】5
About 30 【篠原】6
About 30 【平林】6
About 30 【伏見】5
About 20 【芳沢】4
About 10 【上嶋】5
About 10 【土橋】6
About 10 【辺見】5
About 10 【松沢】6
Very rare 【牛山】5
Very rare 【北原】6
Very rare 【田中】7
Very rare 【田畑】6
Very rare 【土屋】6
Very rare 【藤森】6
Very rare 【西沢】6
Very rare 【浜】6
Very rare 【平沼】5
Very rare 【松井】6
Very rare 【松澤】5
Very rare 【両角】5
Very rare 【山本】7
Very rare 【芳澤】4