Etymology and distribution of 鈕.

Chuu 【鈕】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Niigata-ken Sanjou-shi , Hokkaidou . Niigata-ken Niigata-shi Birth of Shin Iida, Minami-ku. A place name with a record since the Edo period. The place name was also written as "Nitta".