Etymology and distribution of 戸之洞.

Tonohora 【戸之洞】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Oosaka-fu , Kagoshima-ken , Nagasaki-ken .

① Topography . From the protruding land. There is an example meaning Haruhara (Hull). Kagoshima-ken Hioki-shi Fukiage-machi Yunoura, Nagasaki-ken Saikai-shi Distribution in Nishio Town Okushigo.

② Spring exists in the surname of Kagoshima-ken 's Amami archipelago. Kagoshima-ken Amami-shi There is a distribution in Meise Minami-cho. 春 Haru reference.