Etymology and distribution of 恒石.

Tsuneishi 【恒石】^{レベル4
About 1,500}  The Japanese surnames etymology dictionary.

Aomori-ken Mutsu-shi , Toukyou-to , Hokkaidou . Distribution which also includes Yagyu.

① Aomori-ken Shimokita-gun Higashidoori-mura Origin of wild cattle. A place name with a record since the Edo period.

② A variant of 柳生 . Tradition at Toukyou-to . 柳生 Yagyuu reference.

③ Saitama-ken Shiraoka-shi Origin of beef ( Yagyu ) birth. A place name with a record since the Edo period. The place name was also written as "Yagyu". Ibaraki-ken Mito-shi Sannomaru was in the Edo period in the Mito samurai of the Clan office. Kanagawa-ken tells that the same samurai was given to the Edo period from the same lord Tokugawa Yoshiaki after the original place of residence.