Etymology and distribution of 石応.

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

Nara-ken Kashihara-shi , Kyouto-fu . A variant of 五十君 . Meiji New surname by monk. An example of a temple. Nara-ken Kashihara-shi Kofuku - ji Temple in Shimosuke Town, Nara-ken Kashihara-shi Saiko-ji in Jodo sect in Imai-machi. In Saikoji it is said that Kyouto-fu Kyouto-shi gave "Su" from the Arisugawa Palace of the Miyae who was in the Edo period. 五十君 Isogimi reference.