Etymology and distribution of 桶元.

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 桶元.

カンマ区切りで複数の名字を指定できます。

Etymology of 桶元

Distribution of 桶元
Ranking
1 Toyama-ken(0.00342%)
2 Ishikawa-ken(0.000342%)
3 Hyougo-ken(Very rare)
4 Aichi-ken(Very rare)