Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
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群馬県 利根郡川場村 萩室の名字

About 70 【外山】6
About 70 【角田】6
About 30 【吉野】6
About 20 【小林】7
About 20 【横坂】4
About 10 【久保田】6
About 10 【関】6
About 10 【信沢】4
About 10 【宇敷】4
About 10 【大川】6
About 10 【川田】6
About 10 【宮内】6
About 10 【高井】6
About 10 【兵藤】5
About 10 【松井】6
About 10 【松沢】6
Very rare 【井上】7
Very rare 【砂山】5
Very rare 【大河原】5
Very rare 【金井】6
Very rare 【桑原】6
Very rare 【見城】5
Very rare 【後藤】7
Very rare 【菅沼】6
Very rare 【関根】6
Very rare 【滝沢】6
Very rare 【土屋】6