Etymology and distribution of 寺曽.

Teraso 【寺曽】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Toyama-ken . Toyama-ken Himi-shi Tairaemon gate of the Heike Fraternity who was in Buddha Temple passed through Toyama-ken Takaoka-shi Niizuka and tells that he came to Toyama-ken Nanto-shi Kaide and called it. Estimated in the Kamakura period. There is Mr. Hachiro (Mr. Hachiro) in the name of the man. 平 Taira reference.