Etymology and distribution of 入沢.

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!

「入沢」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 入沢

Distribution of 入沢
Ranking
1 Gunma-ken(0.075%)
2 Niigata-ken(0.0407%)
3 Tottori-ken(0.0242%)
4 Okayama-ken(0.0161%)
5 Kanagawa-ken(0.00877%)
6 Tochigi-ken(0.00776%)
7 Saitama-ken(0.00661%)
8 Hiroshima-ken(0.00649%)
9 Toukyou-to(0.00627%)
10 Shizuoka-ken(0.00588%)
11 Shimane-ken(0.00556%)
12 Yamanashi-ken(0.00338%)
13 Nagano-ken(0.00328%)
14 Chiba-ken(0.00318%)
15 Hokkaidou(0.00314%)
16 Iwate-ken(0.00257%)
17 Oosaka-fu(0.00219%)
18 Kyouto-fu(0.00216%)
19 Fukuoka-ken(0.00168%)
20 Fukushima-ken(0.00161%)
21 Ibaraki-ken(0.00157%)
22 Ehime-ken(0.00123%)
23 Aichi-ken(0.00114%)
24 Aomori-ken(0.00105%)
25 Hyougo-ken(0.000985%)
26 Miyagi-ken(0.000834%)
27 Wakayama-ken(0.000685%)
28 Kumamoto-ken(0.000684%)
29 Ishikawa-ken(0.000683%)
30 Yamagata-ken(0.000622%)
31 Gifu-ken(0.000566%)
32 Fukui-ken(0.000478%)
33 Yamaguchi-ken(0.000478%)
34 Mie-ken(0.000438%)
35 Toyama-ken(0.000342%)
36 Akita-ken(0.0003%)
37 Nara-ken(0.000297%)
38 Nagasaki-ken(0.000258%)