Etymology and distribution of 伊庭.

Iba 【伊庭】^{レベル5
About 3,200}  The Japanese surnames etymology dictionary.

Kagawa-ken Takamatsu-shi , Hokkaidou , Hiroshima-ken . Distribution including Iwab too.

① Kagawa-ken Takamatsu-shi Birthplace of Shioe Town Yasuharae (formerly Iwabe). A place name with a record since the Edo period. It was in Muromachi period in Iwabe Castle. The place name, the castle name is Iwabu.

② Origin of Chiba-ken Katori-shi Iwabe. Place name with a record since the North / South morning era.

Iniwa 【伊庭】^{レベル5
About 3,200}  The Japanese surnames etymology dictionary.

入谷 Iritani reference.