Etymology and distribution of 磊.

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
↑オフライン検索できるアプリもどうぞ

Ratio of 磊.

カンマ区切りで複数の名字を指定できます。

Etymology of 磊

Distribution of 磊
Ranking
1 Ishikawa-ken(0.000342%)
2 Mie-ken(0.000219%)
3 Hyougo-ken(0.000164%)
4 Hokkaidou(0.00014%)
5 Shizuoka-ken(0.000111%)
6 Kanagawa-ken(Very rare)