Etymology and distribution of 外音防.

Sotoonbou 【外音防】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hokkaidou , Fukui-ken Oono-shi , Oosaka-fu . Thing . Variant of 土倉 . Hyougo-ken Ono-shi Nishimoto-cho was in the Edo period in the Ono Clan in the Clan Office. The same family clan also had a family name in Saito in the Edo period. 戸蔵 Togura reference.