The Japanese surnames etymology dictionary.
Kyouto-fu Kyouto-shi . Thing . Kyouto-fu Kyouto-shi From the name of the temple near Koyouin- monument in Kamigyo-ku, Kamigyo-ku. From 1099 to 1104 (Yasuto year), Fujiwara Yoshimi founded a Buddhist priest called Yasukunin in the residence and got it from the name of Shimodatein. 藤原 reference.