Etymology and distribution of 窪庭.

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

Popuration of 窪庭.

カンマ区切りで複数の名字を指定できます。

Etymology of 窪庭

Distribution of 窪庭
Ranking
1 Ibaraki-ken(About 60)
2 Kanagawa-ken(About 20)
3 Gunma-ken(About 10)
4 Chiba-ken(Very rare)
4 Oosaka-fu(Very rare)
4 Toukyou-to(Very rare)