Etymology and distribution of 延江.

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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Popuration of 延江.

カンマ区切りで複数の名字を指定できます。

Etymology of 延江

Distribution of 延江
Ranking
1 Okayama-ken(About 100)
2 Chiba-ken(About 20)
2 Oosaka-fu(About 20)
4 Aichi-ken(About 10)
5 Hiroshima-ken(About 10)
6 Hyougo-ken(Very rare)
6 Saitama-ken(Very rare)
6 Nara-ken(Very rare)
6 Toukyou-to(Very rare)