Onoyama 【小埜山】2 The Japanese surnames etymology dictionary.
② Topography . Tokushima-ken Tokushima-shi Tokushima-machi castle inside was in the Edo period in the Tokushima Samurai of the Clan office. In the early Edo period, the same clan says that he changed the pine tree of Kasamatsu surname "Oka". 笠松 reference.