Etymology and distribution of 一久.

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
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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!
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一久さんの分布

Population

Distributions by prefecture
都道府県分布数図
Distributions by city
市区町村分布数図
Distributions by subregion
小地域分布数図
Whole Japan Prefectures
レベル2 1 Fukuoka-ken(About 20)
2 Toukyou-to(Very rare)
2 Niigata-ken(Very rare)
2 Oosaka-fu(Very rare)
2 Hyougo-ken(Very rare)
PopulationAbout 30
RankingOut of ranking
Rank by city
1 Iidzuka-shi(About 10)
2 Kitakyuushuu-shi Kokurakita-ku(Very rare)
2 Fukuoka-shi Minami-ku(Very rare)
2 Shibuya-ku(Very rare)
2 Niigata-shi(Very rare)
2 Ibaraki-shi(Very rare)
2 Koube-shi Kita-ku(Very rare)
Rank by subregion
1 福岡県 飯塚市 相田(About 10)

Distributions of ratios

Distributions of ratios by prefecture
都道府県分布比率図
Distributions of ratios by city
市区町村分布比率図
Distributions of ratios by subregion
小地域分布比率図
Whole Japan Prefectures
RatiosVery rare 1 Fukuoka-ken(0.000395%)
2 Niigata-ken(0.000161%)
3 Hyougo-ken(Very rare)
4 Oosaka-fu(Very rare)
5 Toukyou-to(Very rare)
Rank by city
1 Iidzuka-shi(0.00615%)
2 Shibuya-ku(0.0034%)
3 Kitakyuushuu-shi Kokurakita-ku(0.00278%)
4 Fukuoka-shi Minami-ku(0.00269%)
5 Koube-shi Kita-ku(0.0022%)
6 Ibaraki-shi(0.002%)
7 Niigata-shi(0.00052%)
Rank by subregion

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