Etymology and distribution of 河谷内.

Kawayachi 【河谷内】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Fukushima-ken Fukushima-shi . Mie-ken Inabe-shi It was in Edo period in Higashi Village in Kita-cho. Tell him that the descendant of Mr. Kusunoki called on the same place. 楠木 Kusunoki reference.