Oscar proud off the proud family
Olive Oyl is a character in the Popeye cartoon. It begins with the letter O.
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Oswald the Octopus (http://www.imdb.com/title/tt0293734/)
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Uryu ishida from bleach bleach is on at eleven o clock or 11:30
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Ouzo
Olivier B. Bommel
Oreo
Bonkers - 1993 O Cartoon My Cartoon 1-48 was released on: USA: 10 November 1993
The names of cars start with letters of the alphabet. Some of the names are Acura, Chevrolet, Kia and Toyota.
This was actually South Park's interpretation of the Orko character from He-Man. In the episode trilogy of Imaginationland, this character appears with a "D" on his shirt instead of the "O" that was original to the He-Man series.