Etymology and distribution of 丹生川.

Niukawa 【丹生川】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Nagano-ken Adzumino-shi . Creation . Nagano-ken Adzumino-shi Hotaka is based. It is said that Mr. Nishina has been called from 1532 to 1555 (astronomical year) in the same place. There is also a passage that it was given to the same place in 1536 (Astronomical 5th year). 仁科 Nishina reference.