Etymology and distribution of 道徳.

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 道徳.

カンマ区切りで複数の名字を指定できます。

Etymology of 道徳

Distribution of 道徳
Ranking
1 Toyama-ken(About 60)
2 Hokkaidou(About 20)
3 Saitama-ken(About 10)
3 Hiroshima-ken(About 10)
5 Chiba-ken(Very rare)
5 Toukyou-to(Very rare)
5 Nagano-ken(Very rare)