Etymology and distribution of 沼井.

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!

「沼井」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 沼井

Distribution of 沼井
Ranking
1 Kanagawa-ken(About 200)
2 Tochigi-ken(About 120)
3 Ehime-ken(About 80)
4 Toukyou-to(About 70)
5 Oosaka-fu(About 60)
6 Saitama-ken(About 60)
6 Wakayama-ken(About 60)
8 Iwate-ken(About 40)
9 Hyougo-ken(About 30)
10 Fukushima-ken(About 20)
10 Yamaguchi-ken(About 20)
10 Hokkaidou(About 20)
13 Hiroshima-ken(About 20)
14 Aomori-ken(About 10)
14 Ibaraki-ken(About 10)
14 Toyama-ken(About 10)
17 Aichi-ken(About 10)
17 Kyouto-fu(About 10)
19 Nagano-ken(Very rare)
19 Fukuoka-ken(Very rare)
19 Okayama-ken(Very rare)
19 Miyagi-ken(Very rare)
19 Nara-ken(Very rare)
19 Chiba-ken(Very rare)