Etymology and distribution of 常諾.

Tokonagi 【常諾】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Yamaguchi-ken Iwakuni-shi · Kanagawa-ken . Terrain . From gutters and trees and projecting lands. In Yamaguchi-ken Iwakuni-shi telling that in 1779 (Yasunaga 8 years) the descendant of Mr. Kira called. 吉良 Kira reference.