Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
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長野県 飯山市 小佐原の名字

About 80 【前沢】5
About 40 【小林】7
About 20 【高橋】7
About 20 【渡辺】7
About 10 【阿部】7
About 10 【大塚】6
Very rare 【荒井】6
Very rare 【大日方】5
Very rare 【斉藤】7
Very rare 【関】6
Very rare 【徳永】6
Very rare 【中村】7
Very rare 【前澤】5
Very rare 【丸山】7
Very rare 【柳】6