Etymology and distribution of 去來川.

Isagawa 【去來川】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Saitama-ken Saitama-shi . Last name including "I", name of male including "good" Yes. Okayama-ken Tsuyama-shi Yamashita was in the Edo period in the Tsuyama clan of the clan office.