Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
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青森県 東津軽郡平内町 外童子平畑の名字

About 110 【太田】7
About 70 【渡辺】7
About 60 【倉本】6
About 10 【外山】6
Very rare 【宇佐美】6
Very rare 【小田桐】5
Very rare 【後藤】7
Very rare 【佐々木】7
Very rare 【笹原】5
Very rare 【田中】7
Very rare 【田村】7
Very rare 【西多】3
Very rare 【三浦】7
Very rare 【山本】7