Etymology and distribution of 無江.

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 無江.

カンマ区切りで複数の名字を指定できます。

Etymology of 無江

Distribution of 無江
Ranking
1 Hokkaidou(About 60)
2 Miyagi-ken(Very rare)
2 Toukyou-to(Very rare)
2 Fukui-ken(Very rare)
2 Akita-ken(Very rare)