Etymology and distribution of 大主.

Oonushi 【大主】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Oosaka-fu · Kanagawa-ken . Variety of 小塙 . Toukyou-to Chiyoda-ku Chiyoda was in the Edo era as the shogunate of the Edo shogunate of the government agency. 小塙 Kobanawa reference.