Etymology and distribution of 日柳.

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
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Ratio of 日柳.

カンマ区切りで複数の名字を指定できます。

Etymology of 日柳

Distribution of 日柳
Ranking
1 Yamaguchi-ken(0.00215%)
2 Kagawa-ken(0.00153%)
3 Miyazaki-ken(0.00136%)
4 Kouchi-ken(0.000861%)
5 Okayama-ken(0.00061%)
6 Nara-ken(0.000297%)
7 Toukyou-to(0.000199%)
8 Chiba-ken(0.000176%)
9 Oosaka-fu(0.000173%)
10 Saitama-ken(Very rare)