Etymology and distribution of 大付.

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

Toukyou-to . Birth of Nagano-ken Suwa-gun Fujimi-machi Occupation. A place name with a record since the Edo period. The place name was also written as "bone bone" and there was also pronunciation of Otsukoto.