Etymology and distribution of 居組.

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 居組.

カンマ区切りで複数の名字を指定できます。

Etymology of 居組

Distribution of 居組
Ranking
1 Tottori-ken(0.00848%)
2 Kyouto-fu(0.000333%)
3 Oosaka-fu(0.00023%)
4 Gifu-ken(0.000189%)
5 Kanagawa-ken(Very rare)