Etymology and distribution of 河流.

Kawaryuu 【河流】^{レベル2
About 40}  The Japanese surnames etymology dictionary.

Niigata-ken Niigata-shi , Hokkaidou , Fukui-ken . Fukui-ken Echizen-shi Origin of the country-town. In 1598 (the third year of Keicho) the name of a place with a record as "National Gold". Niigata-ken Niigata-shi Tells Nakano - ku that it is a pioneer in Nakano-yama.

※ Ishikawa-ken Suzu-shi Wakayamachi Utsunoyama area (formerly national) is the origin. The place name is estimated from the person's name. Tell him that he is the descendant of Mr. Ping. 平 Taira reference.