Etymology and distribution of 降矢.

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!

「降矢」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 降矢

Distribution of 降矢
Ranking
1 Yamanashi-ken(About 700)
2 Fukushima-ken(About 500)
3 Toukyou-to(About 400)
4 Kanagawa-ken(About 200)
5 Hyougo-ken(About 130)
6 Saitama-ken(About 120)
7 Oosaka-fu(About 80)
8 Chiba-ken(About 70)
8 Hokkaidou(About 70)
10 Nagano-ken(About 50)
11 Shizuoka-ken(About 50)
12 Kyouto-fu(About 40)
13 Tochigi-ken(About 40)
14 Miyagi-ken(About 30)
15 Ibaraki-ken(About 30)
16 Aichi-ken(About 10)
17 Aomori-ken(About 10)
17 Ishikawa-ken(About 10)
17 Shiga-ken(About 10)
17 Niigata-ken(About 10)
21 Gunma-ken(Very rare)
21 Hiroshima-ken(Very rare)
21 Okayama-ken(Very rare)
21 Yamaguchi-ken(Very rare)
21 Nara-ken(Very rare)
21 Wakayama-ken(Very rare)