Etymology and distribution of 友貞.

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!

「友貞」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 友貞

Distribution of 友貞
Ranking
1 Saga-shi(About 50)
2 Nemuroshi-chou Betsukai-chou(About 30)
2 Higashihiroshima-shi(About 30)
4 Ogi-shi(About 10)
4 Kanzaki-gun Yoshinogari-chou(About 10)
4 Hikari-shi(About 10)
4 Shuunan-shi(About 10)
4 Okayama-shi(About 10)
4 Hiroshima-shi Minami-ku(About 10)
4 Shoubara-shi(About 10)
4 Hachiouji-shi(About 10)
4 Suzu-shi(About 10)
4 Kitakyuushuu-shi Yahatanishi-ku(About 10)
4 Oomuta-shi(About 10)
4 Nagasaki-shi(About 10)
16 Imari-shi(Very rare)
16 Miki-shi(Very rare)
16 Koube-shi Tarumi-ku(Very rare)
16 Kitami-shi(Very rare)
16 Asahikawa-shi(Very rare)
16 Sapporo-shi Kita-ku(Very rare)
16 Sapporo-shi Minami-ku(Very rare)
16 Nemuroshi-chou Nakashibetsu-chou(Very rare)
16 Kashiwa-shi(Very rare)
16 Beppu-shi(Very rare)
16 Tsukumi-shi(Very rare)
16 Sakai-shi(Very rare)
16 Higashioosaka-shi(Very rare)
16 Matsubara-shi(Very rare)
16 Minoo-shi(Very rare)
16 Miyazaki-shi(Very rare)
16 Iwakuni-shi(Very rare)
16 Kanoashi-gun Yoshika-chou(Very rare)
16 Hiroshima-shi Nishi-ku(Very rare)
16 Mitaka-shi(Very rare)
16 Setagaya-ku(Very rare)
16 Kokubunji-shi(Very rare)
16 Fuchuu-shi(Very rare)
16 Choufu-shi(Very rare)
16 Koushi-shi(Very rare)
16 Yokohama-shi Asahi-ku(Very rare)
16 Nakama-shi(Very rare)
16 Kitakyuushuu-shi Kokurakita-ku(Very rare)
16 Fukuoka-shi Chuuou-ku(Very rare)
16 Chikushino-shi(Very rare)
16 Iidzuka-shi(Very rare)
16 Isahaya-shi(Very rare)
16 Shizuoka-shi(Very rare)