Etymology and distribution of 豊久.

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!

「豊久」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 豊久

Distribution of 豊久
Ranking
1 Buzen-shi(About 30)
2 Mimasaka-shi(About 30)
3 Minamiuwa-gun Ainan-chou(About 20)
4 Naruto-shi(About 20)
5 Yawata-shi(About 10)
5 Beppu-shi(About 10)
5 Marugame-shi(About 10)
8 Koube-shi Higashinada-ku(About 10)
8 Ooita-shi(About 10)
8 Takatsuki-shi(About 10)
8 Okayama-shi(About 10)
8 Itano-gun Matsushige-chou(About 10)
8 Kikuchi-shi(About 10)
8 Yokohama-shi Kouhoku-ku(About 10)
8 Kurume-shi(About 10)
8 Tagawa-shi(About 10)
8 Aki-shi(About 10)
8 Sakaiminato-shi(About 10)
19 Nagaokakyou-shi(Very rare)
19 Saga-shi(Very rare)
19 Himeji-shi(Very rare)
19 Koube-shi Tarumi-ku(Very rare)
19 Abashirishi-chou Bihoro-chou(Very rare)
19 Tokorozawa-shi(Very rare)
19 Usa-shi(Very rare)
19 Katano-shi(Very rare)
19 Oosaka-shi Konohana-ku(Very rare)
19 Higashioosaka-shi(Very rare)
19 Hirakata-shi(Very rare)
19 Ibaraki-shi(Very rare)
19 Katsuta-gun Shouou-chou(Very rare)
19 Tsuyama-shi(Very rare)
19 Kure-shi(Very rare)
19 Onomichi-shi(Very rare)
19 Hiroshima-shi Naka-ku(Very rare)
19 Hiroshima-shi Minami-ku(Very rare)
19 Hatsukaichi-shi(Very rare)
19 Tokushima-shi(Very rare)
19 Kitanagoya-shi(Very rare)
19 Nagoya-shi Tenpaku-ku(Very rare)
19 Oota-ku(Very rare)
19 Fuchuu-shi(Very rare)
19 Suginami-ku(Very rare)
19 Kumamoto-shi(Very rare)
19 Hiratsuka-shi(Very rare)
19 Yokohama-shi Izumi-ku(Very rare)
19 Fukuoka-shi Higashi-ku(Very rare)
19 Chikujou-gun Chikujou-machi(Very rare)
19 Aki-gun Geisei-mura(Very rare)
19 Sukumo-shi(Very rare)