Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
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高知県 四万十市 藤ノ川の名字

About 80 【稲田】6
About 70 【武内】6
About 20 【今城】5
About 20 【脇坂】5
About 20 【阿部】7
About 20 【遠地】3
About 20 【芝】5
About 10 【沖】6
About 10 【田辺】6
About 10 【木戸】6
About 10 【那須】6
About 10 【藤本】7
About 10 【森】7
Very rare 【新玉】3
Very rare 【三森】5
Very rare 【柴藤】4
Very rare 【高橋】7
Very rare 【土居】6
Very rare 【中平】5
Very rare 【西森】5
Very rare 【吉井】6
Very rare 【蕨川】3