Onion
* Orange
Opra
Otto Van Bismarck
Some names beginning with the letter O are:OlafOleanderOliveOliverOllieOmarOpalOpheliaOprahOrvilleOscarOtto
Orlaith, Olive, Oliviea
Onimokpoy
Ox or oxen
old McDonald
Oakland is a city in California. It begins with the letter O.
Oldsmobile and Opel are the only car manufacturers I can name that start with O.
starts with h------o
In Irish names "Mac" means "Son" and "Ó" means "Grandson"