Etymology and distribution of 北小矢.

Kitakoya 【北小矢】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hyougo-ken , Nagano-ken , Oosaka-fu . Terrain . From a black mound. Hyougo-ken Himeji-shi Distributed in the three decorative houses. 黒田 surname is in the same place. There is Tsukamachi in the stamps of the same place. 黒田 Kuroda reference. Nagano-ken Komagane-shi Distributed in Ako.