Etymology and distribution of 古久根.

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!

「古久根」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 古久根

Distribution of 古久根
Ranking
1 Hekinan-shi(About 200)
2 Okazaki-shi(About 20)
2 Nishio-shi(About 20)
2 Takahama-shi(About 20)
5 Ichikawa-shi(About 10)
5 Suginami-ku(About 10)
5 Hamamatsu-shi(About 10)
8 Ichinomiya-shi(About 10)
8 Kariya-shi(About 10)
8 Nagoya-shi Nakagawa-ku(About 10)
8 Nagoya-shi Nakamura-ku(About 10)
8 Chita-shi(About 10)
8 Chiryuu-shi(About 10)
8 Toyohashi-shi(About 10)
8 Toyota-shi(About 10)
8 Choufu-shi(About 10)
8 Toshima-ku(About 10)
8 Kamiina-gun Miyada-mura(About 10)
19 Uji-shi(Very rare)
19 Nishinomiya-shi(Very rare)
19 Saitama-shi Chuuou-ku(Very rare)
19 Misato-shi(Very rare)
19 Tokorozawa-shi(Very rare)
19 Nara-shi(Very rare)
19 Okayama-shi(Very rare)
19 Miyoshi-shi(Very rare)
19 Handa-shi(Very rare)
19 Nagoya-shi Chikusa-ku(Very rare)
19 Nagoya-shi Minami-ku(Very rare)
19 Nagoya-shi Meitou-ku(Very rare)
19 Nagoya-shi Higashi-ku(Very rare)
19 Nagoya-shi Minato-ku(Very rare)
19 Anjou-shi(Very rare)
19 Ama-gun Ooharu-chou(Very rare)
19 Toyoake-shi(Very rare)
19 Edogawa-ku(Very rare)
19 Nishitama-gun Okutama-machi(Very rare)
19 Nishitoukyou-shi(Very rare)
19 Sagamihara-shi(Very rare)
19 Komagane-shi(Very rare)
19 Shizuoka-shi(Very rare)