Etymology and distribution of 二井川.

Niikawa 【二井川】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Hyougo-ken , Toukyou-to . 藤原 family name is present. Toukyou-to Hachiouji-shi Tell Yokoyama Mr. Yokoyama of the Musashi Nanba Party based in the Heian period and the Kamakura period near Yokoyama-cho. Mr. Yokoyama has a transmission with Mr. Ono's descendant. 藤原 Fujiwara reference. 小野 Ono reference. 横山 Yokoyama reference.