Etymology and distribution of 石古.

Ishiko 【石古】^{レベル3
About 200}  The Japanese surnames etymology dictionary.

Kumamoto-ken , Okayama-ken Tamano-shi .

① Kumamoto-ken Kuma-gun Kuma-mura Originated from Isshiki in the bottom of the island.

② Okayama-ken Tamano-shi is based in Yahama - cho Hachihama. Mie-ken Tsu-shi Marunouchi was in the Edo period in the Tsu samurai of the clan office, Mie-ken Iga-shi was in Azabu Momoyama period in Saana Town.

③ Miyagi-ken Kurihara-shi Originated from Shiba Hime near Yokadozakizaki (formerly known as Itazaki). Place name recorded in Kamakura period and Muromachi era. The place name was also written as "Kaitokazaki". It was in the South and North morning era.