Etymology and distribution of 来代.

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 来代.

カンマ区切りで複数の名字を指定できます。

Etymology of 来代

Distribution of 来代
Ranking
1 Tokushima-ken(0.0108%)
2 Kagawa-ken(0.00115%)
3 Oosaka-fu(0.000461%)
4 Kouchi-ken(0.000431%)
5 Wakayama-ken(0.000342%)
6 Kyouto-fu(0.000333%)
7 Hyougo-ken(0.000246%)
8 Ehime-ken(0.000246%)
9 Toukyou-to(0.000199%)
10 Kanagawa-ken(0.000184%)
11 Ibaraki-ken(0.000142%)
12 Saitama-ken(Very rare)