Etymology and distribution of 神井.

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
↑オフライン検索できるアプリもどうぞ
在日通名大全

日本初、在日通名の研究書「在日通名大全」発売中!
ネットの電話帳 住宅地図 マッポン!

「神井」さんの名字の分布数。

カンマ区切りで複数の名字を指定できます。

Etymology of 神井

Distribution of 神井
Ranking
1 Higashiusuki-gun Kadogawa-chou(About 50)
2 Akou-shi(About 20)
3 Ashiya-shi(About 20)
4 Himeji-shi(About 10)
4 Takatsuki-shi(About 10)
6 Oozu-shi(About 10)
6 Kouka-shi(About 10)
6 Iwata-shi(About 10)
9 Kyouto-shi Yamashina-ku(Very rare)
9 Kyouto-shi Nishikyou-ku(Very rare)
9 Itami-shi(Very rare)
9 Akashi-shi(Very rare)
9 Takasago-shi(Very rare)
9 Chitose-shi(Very rare)
9 Kamogawa-shi(Very rare)
9 Niiza-shi(Very rare)
9 Oosaka-shi Asahi-ku(Very rare)
9 Koyu-gun Takanabe-chou(Very rare)
9 Miyazaki-shi(Very rare)
9 Hyuuga-shi(Very rare)
9 Matsuyama-shi(Very rare)
9 Nerima-ku(Very rare)
9 Adachi-ku(Very rare)
9 Yokohama-shi Sakae-ku(Very rare)
9 Fukuoka-shi Nishi-ku(Very rare)
9 Omitama-shi(Very rare)
9 Hamamatsu-shi(Very rare)