Etymology and distribution of 徳繁.

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 徳繁.

カンマ区切りで複数の名字を指定できます。

Etymology of 徳繁

Distribution of 徳繁
Ranking
1 Nagano-ken(About 20)
2 Chiba-ken(About 10)
2 Kagawa-ken(About 10)
4 Saitama-ken(Very rare)
4 Yamaguchi-ken(Very rare)
4 Okayama-ken(Very rare)
4 Toukyou-to(Very rare)
4 Kanagawa-ken(Very rare)
4 Fukushima-ken(Very rare)
4 Shizuoka-ken(Very rare)