Etymology and distribution of 本造.

Honzou 【本造】^{レベル3
About 50}  The Japanese surnames etymology dictionary.

Shiga-ken Takashima-shi . Terrain . Added "river" to Yokoi. Iwate-ken tells that he came to Iwate-ken Morioka-shi from Shiga-ken Takashima-shi in 1694 (Genroku 7 years) and renamed from Yokoi surname. The pronunciation in tradition is Yokoikawa. 横井 Yokoi reference. Shiga-ken Takashima-shi Katsuno was in the Edo era as a clan of Otsuki of the Clan Office.