Etymology and distribution of 杞川.

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

Fukuoka-ken . A variant of 熊井 . Fukuoka-ken Tagawa-gun Soeda-machi Mr. Kumai who was in the rockstone mountain castle in Senda during the Warring States period was also written as "Kumae". 熊井 Kumai reference.

※ Fukuoka-ken Asakura-shi Kumae (bear) is a place name with a record since the Edo period. The place name was also written as "Kumae".