Etymology and distribution of 貞光.

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!

「貞光」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 貞光

Distribution of 貞光
Ranking
1 Yamaguchi-ken(About 200)
2 Fukuoka-ken(About 200)
3 Hiroshima-ken(About 200)
4 Kanagawa-ken(About 50)
5 Okayama-ken(About 40)
6 Oosaka-fu(About 30)
7 Aichi-ken(About 20)
7 Tokushima-ken(About 20)
7 Saga-ken(About 20)
10 Kouchi-ken(About 20)
10 Nagasaki-ken(About 20)
10 Toukyou-to(About 20)
10 Gifu-ken(About 20)
10 Nara-ken(About 20)
10 Hyougo-ken(About 20)
16 Saitama-ken(About 10)
17 Kagoshima-ken(About 10)
17 Shizuoka-ken(About 10)
17 Chiba-ken(About 10)
17 Kyouto-fu(About 10)
17 Mie-ken(About 10)
22 Tottori-ken(Very rare)
22 Kagawa-ken(Very rare)
22 Gunma-ken(Very rare)
22 Fukui-ken(Very rare)
22 Kumamoto-ken(Very rare)
22 Hokkaidou(Very rare)