Etymology and distribution of 大杤.

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

Kagawa-ken , Gunma-ken , Niigata-ken . 小野 surname available. 小野 Ono reference. Ishikawa-ken Tell the Daishoji in Kaga-shi that there was a Konnosakaji in the Heian period. Wakayama-ken Tanabe-shi There is a Konosaka Pass in Naka Nogyo.