Etymology and distribution of 内.

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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「内」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 内

Distribution of 内
Ranking
1 Kagoshima-ken(About 1,600)
2 Oosaka-fu(About 300)
3 Miyazaki-ken(About 130)
4 Fukuoka-ken(About 100)
5 Hyougo-ken(About 100)
6 Toukyou-to(About 90)
7 Kanagawa-ken(About 90)
8 Aichi-ken(About 80)
9 Yamaguchi-ken(About 60)
10 Saitama-ken(About 40)
11 Ishikawa-ken(About 40)
11 Chiba-ken(About 40)
11 Hokkaidou(About 40)
14 Toyama-ken(About 30)
15 Kumamoto-ken(About 30)
15 Hiroshima-ken(About 30)
15 Okayama-ken(About 30)
18 Nagasaki-ken(About 20)
19 Shizuoka-ken(About 20)
19 Kyouto-fu(About 20)
19 Mie-ken(About 20)
22 Ehime-ken(About 10)
22 Nara-ken(About 10)
22 Ooita-ken(About 10)
25 Miyagi-ken(About 10)
26 Ibaraki-ken(Very rare)
26 Gunma-ken(Very rare)
26 Fukui-ken(Very rare)
26 Tochigi-ken(Very rare)
26 Gifu-ken(Very rare)
26 Yamanashi-ken(Very rare)
26 Yamagata-ken(Very rare)
26 Saga-ken(Very rare)