Etymology and distribution of 岩神.

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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Popuration of 岩神.

カンマ区切りで複数の名字を指定できます。

Etymology of 岩神

Distribution of 岩神
Ranking
1 Kouchi-ken(About 70)
2 Hiroshima-ken(About 60)
3 Oosaka-fu(About 30)
4 Hyougo-ken(About 20)
4 Kagoshima-ken(About 20)
6 Nara-ken(About 10)
7 Saitama-ken(Very rare)
7 Yamaguchi-ken(Very rare)
7 Fukuoka-ken(Very rare)