Etymology and distribution of 渡石.

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

Miyazaki-ken Miyakonojou-shi , Kagoshima-ken , Shimane-ken Goutsu-shi .

① Estimated from "flowers and favorites". Miyazaki-ken Miyakonojou-shi Oobo cho is based.

② things . From flowers. Shimane-ken Goutsu-shi In Ninomiya Shrine god tells me that it was called Meiji Shin surname from "flower" of flower disposition, flower shop called Toshiyoshi surname in the Edo period. 地吉 Chiyoshi reference.