Etymology and distribution of 浜桐.

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 浜桐.

カンマ区切りで複数の名字を指定できます。

Etymology of 浜桐

Distribution of 浜桐
Ranking
1 Hiroshima-ken(0.00115%)
2 Hyougo-ken(0.000328%)
3 Yamaguchi-ken(0.000239%)
4 Ibaraki-ken(0.000142%)
5 Oosaka-fu(0.000115%)
6 Chiba-ken(Very rare)