Etymology and distribution of 西信.

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 西信.

カンマ区切りで複数の名字を指定できます。

Etymology of 西信

Distribution of 西信
Ranking
1 Hiroshima-ken(0.00361%)
2 Okayama-ken(0.000813%)
3 Wakayama-ken(0.000342%)
4 Nara-ken(0.000297%)
5 Ehime-ken(0.000246%)
6 Tochigi-ken(0.000222%)
7 Oosaka-fu(0.000115%)
8 Chiba-ken(Very rare)
9 Hyougo-ken(Very rare)
10 Aichi-ken(Very rare)
11 Kanagawa-ken(Very rare)