Etymology and distribution of 坪口.

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
在日通名大全

日本初、在日通名の研究書「在日通名大全」発売中!
ネットの電話帳 住宅地図 マッポン!

「坪口」さんの名字の分布数。

カンマ区切りで複数の名字を指定できます。

Etymology of 坪口

Distribution of 坪口
Ranking
1 Nagasaki-ken(About 80)
2 Hyougo-ken(About 40)
3 Oosaka-fu(About 30)
4 Kagoshima-ken(About 30)
4 Fukui-ken(About 30)
6 Ishikawa-ken(About 20)
6 Nara-ken(About 20)
8 Shizuoka-ken(About 20)
9 Kanagawa-ken(About 10)
9 Shiga-ken(About 10)
9 Okayama-ken(About 10)
12 Kumamoto-ken(About 10)
12 Toukyou-to(About 10)
12 Aichi-ken(About 10)
12 Gifu-ken(About 10)
16 Ibaraki-ken(Very rare)
16 Yamanashi-ken(Very rare)
16 Yamaguchi-ken(Very rare)
16 Saitama-ken(Very rare)
16 Wakayama-ken(Very rare)
16 Hokkaidou(Very rare)
16 Saga-ken(Very rare)