Etymology and distribution of 済賀.

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

Ratio of 済賀.

カンマ区切りで複数の名字を指定できます。

Etymology of 済賀

Distribution of 済賀
Ranking
1 Ibaraki-ken(0.00185%)
2 Chiba-ken(0.000882%)
3 Hokkaidou(0.000209%)
4 Toukyou-to(0.000149%)