Etymology and distribution of 古柳.

The Japanese surnames etymology dictionary.
https://play.google.com/store/apps/details?id=info.jigensha.jcedfreeGoogle Play で手に入れよう https://apps.apple.com/us/app/id1471109324
↑オフライン検索できるアプリもどうぞ

Ratio of 古柳.

カンマ区切りで複数の名字を指定できます。

Etymology of 古柳

Distribution of 古柳
Ranking
1 Mie-gun Kawagoe-chou(0.0391%)
2 Ogoori-shi(0.0256%)
3 Oochi-gun Oonan-chou(0.0224%)
4 Ooshima-gun Suouooshima-chou(0.0103%)
5 Oobu-shi(0.00605%)
6 Oosaka-shi Asahi-ku(0.00501%)
7 Urayasu-shi(0.00501%)
8 Uruma-shi(0.00498%)
9 Oosaka-shi Joutou-ku(0.00345%)
10 Fujieda-shi(0.00296%)
11 Yokohama-shi Kanagawa-ku(0.00256%)
12 Higashihiroshima-shi(0.00249%)
13 Shizuoka-shi(0.00174%)
14 Yokkaichi-shi(0.00149%)