Etymology and distribution of 鉤流.

Tsuryuu 【鉤流】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Shizuoka-ken Izunokuni-shi , Toukyou-to . A variant of 仁藤 .

* Tell him that Mr. Okawa who is the descendant of Mr. Fujiwara at Yamagata-ken · Akita-ken (formerly Dewa nation) called it. There is a record in 1190 (Bunji 6 years). 藤原 Fujiwara reference. 大河 Ookawa reference.