Etymology and distribution of 入口.

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!

「入口」さんの名字の分布比率。

カンマ区切りで複数の名字を指定できます。

Etymology of 入口

Distribution of 入口
Ranking
1 Nagasaki-ken(0.0536%)
2 Kumamoto-ken(0.0208%)
3 Ishikawa-ken(0.0161%)
4 Tokushima-ken(0.0131%)
5 Fukuoka-ken(0.0126%)
6 Kagawa-ken(0.0115%)
7 Nara-ken(0.0095%)
8 Ehime-ken(0.00836%)
9 Oosaka-fu(0.00616%)
10 Wakayama-ken(0.00582%)
11 Hyougo-ken(0.00484%)
12 Saga-ken(0.00444%)
13 Mie-ken(0.00394%)
14 Shiga-ken(0.0039%)
15 Yamaguchi-ken(0.00358%)
16 Aichi-ken(0.00329%)
17 Kagoshima-ken(0.00325%)
18 Kanagawa-ken(0.00294%)
19 Gifu-ken(0.00207%)
20 Hiroshima-ken(0.00202%)
21 Iwate-ken(0.002%)
22 Tottori-ken(0.00182%)
23 Chiba-ken(0.0015%)
24 Shizuoka-ken(0.00144%)
25 Okayama-ken(0.00142%)
26 Kyouto-fu(0.00133%)
27 Toukyou-to(0.00129%)
28 Hokkaidou(0.00112%)
29 Miyazaki-ken(0.00102%)
30 Gunma-ken(0.00101%)
31 Ooita-ken(0.000965%)
32 Shimane-ken(0.000926%)
33 Saitama-ken(0.000808%)
34 Okinawa-ken(0.000793%)
35 Aomori-ken(0.000785%)
36 Nagano-ken(0.000656%)
37 Ibaraki-ken(0.00057%)
38 Fukui-ken(0.000478%)
39 Kouchi-ken(0.000431%)
40 Toyama-ken(0.000342%)
41 Niigata-ken(0.000161%)