Etymology and distribution of 涛川.

Namikawa 【涛川】^{レベル3
About 140}  The Japanese surnames etymology dictionary.

Nagano-ken , Toukyou-to , Saitama-ken . A variant of 二木 . Nagano-ken Komagane-shi Ako is based. Toukyou-to Chuuou-ku Hatoba- cho has been known as having been called during the Edo period. Gifu-ken Oogaki-shi Shimamata cho Nittsuki was a place name with a record in the notation of "Niki" in the Kamakura period. Chiba-ken Matsudo-shi Netsuki is a place name with a record in the notation of "Niki" in the Muromachi period. 二木 Niki reference.