Etymology and distribution of 花月.

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 花月.

カンマ区切りで複数の名字を指定できます。

Etymology of 花月

Distribution of 花月
Ranking
1 Kagoshima-ken(0.00163%)
2 Kyouto-fu(0.000333%)
3 Shiga-ken(0.000325%)
4 Fukuoka-ken(0.000297%)
5 Oosaka-fu(0.000288%)
6 Kumamoto-ken(0.000228%)
7 Shizuoka-ken(0.000222%)
8 Chiba-ken(0.000176%)
9 Nagano-ken(0.000164%)
10 Kanagawa-ken(0.000123%)
11 Toukyou-to(Very rare)
12 Hyougo-ken(Very rare)
13 Aichi-ken(Very rare)