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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Ratio 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(0.00732%)
2 Hiroshima-ken(0.00187%)
3 Kagoshima-ken(0.00102%)
4 Nara-ken(0.000891%)
5 Hyougo-ken(0.00041%)
6 Oosaka-fu(0.000403%)
7 Yamaguchi-ken(0.000239%)
8 Fukuoka-ken(Very rare)
9 Saitama-ken(Very rare)