Etymology and distribution of 伊久山.

Ikuyama 【伊久山】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Tochigi-ken Shioya-gun Shioya-machi , Tochigi-ken Utsunomiya-shi . Distribution which also includes Ishiori.

① Tochigi-ken Haga-gun Ichikai-machi Origin of Ishiori (Ishiori). Place name with a record since the North / South morning era.

② variant of 岩下 . Tochigi-ken Shioya-gun Shioya-machi Ishioroshi in the road. Tell him that he changed his name from Iwashita surname in the same place. Estimated in the Edo period. 岩下 Iwashita reference.