Ouzo. Overproof Rum.
Newcastle Beer.
O Henry
Old Milwaukee Beer is brewed by Pabst Brewing Company.
Orbit
ozone
owen
Ontario
Orangutan.
A name that starts with an "R" and ends with an "O" could be "Rico." Other possibilities include "Rocco" or "Reno."
There is no animal that has a long o at the beginning.
Oscar
Olive.