Etymology and distribution of 記井.

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 記井.

カンマ区切りで複数の名字を指定できます。

Etymology of 記井

Distribution of 記井
Ranking
1 Tokushima-ken(0.0014%)
2 Miyazaki-ken(0.000679%)
3 Yamaguchi-ken(0.000239%)
4 Aichi-ken(0.000202%)
5 Gifu-ken(0.000189%)
6 Ibaraki-ken(0.000142%)
7 Oosaka-fu(0.000115%)
8 Hokkaidou(Very rare)
9 Kanagawa-ken(Very rare)
10 Toukyou-to(Very rare)