Etymology and distribution of 久井.

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!

「久井」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 久井

Distribution of 久井
Ranking
1 Oosaka-fu(About 600)
2 Hokkaidou(About 200)
3 Hyougo-ken(About 150)
4 Fukuoka-ken(About 100)
5 Kagoshima-ken(About 60)
5 Hiroshima-ken(About 60)
7 Okayama-ken(About 60)
8 Chiba-ken(About 50)
9 Toukyou-to(About 40)
9 Aichi-ken(About 40)
9 Nara-ken(About 40)
12 Nagasaki-ken(About 40)
12 Kyouto-fu(About 40)
14 Kanagawa-ken(About 30)
14 Ishikawa-ken(About 30)
14 Ehime-ken(About 30)
17 Toyama-ken(About 20)
18 Shiga-ken(About 10)
18 Saitama-ken(About 10)
18 Wakayama-ken(About 10)
18 Mie-ken(About 10)
22 Shizuoka-ken(About 10)
22 Fukushima-ken(About 10)
22 Shimane-ken(About 10)
25 Gunma-ken(Very rare)
25 Fukui-ken(Very rare)
25 Okinawa-ken(Very rare)
25 Iwate-ken(Very rare)
25 Yamaguchi-ken(Very rare)