Etymology and distribution of 熊王.

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 熊王.

カンマ区切りで複数の名字を指定できます。

Etymology of 熊王

Distribution of 熊王
Ranking
1 Yamanashi-ken(0.019%)
2 Shizuoka-ken(0.0061%)
3 Kanagawa-ken(0.000736%)
4 Toukyou-to(0.000448%)
5 Ibaraki-ken(0.000285%)
6 Gunma-ken(0.000203%)
7 Chiba-ken(0.000176%)
8 Saitama-ken(0.000147%)
9 Aichi-ken(Very rare)
10 Oosaka-fu(Very rare)