Etymology and distribution of 一吉.

Ichiyoshi 【一吉】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Chiba-ken , Toukyou-to .

① Chiba-ken Narita-shi Origin of Ino. Place name with a record since the North / South morning era.

② 伊与久 's variant. Iyoku is the mainstream in Gunma-ken . 伊与久 Iyoku reference.