Etymology and distribution of 星沢.

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!

「星沢」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 星沢

Distribution of 星沢
Ranking
1 Nagano-ken(About 300)
2 Hokkaidou(About 110)
3 Toukyou-to(About 80)
3 Miyagi-ken(About 80)
5 Kanagawa-ken(About 30)
6 Chiba-ken(About 30)
7 Ishikawa-ken(About 20)
7 Yamagata-ken(About 20)
9 Gunma-ken(About 20)
9 Fukushima-ken(About 20)
11 Aichi-ken(About 10)
11 Saitama-ken(About 10)
13 Ibaraki-ken(About 10)
13 Kumamoto-ken(About 10)
13 Niigata-ken(About 10)
13 Gifu-ken(About 10)
17 Kagoshima-ken(Very rare)
17 Aomori-ken(Very rare)
17 Tochigi-ken(Very rare)
17 Okayama-ken(Very rare)