Oaf – Ozzy

O.B.
O.C. (Ordinary Cat)
O.C. (Other Cat)
O.F.C. (Our First Cat)
O.J.
O.J. Simpson
O.T.M.
Oaf
Oakes
Oakley
Oakley Lucifer Fila Nike Levi Reebok
Oasis
Oatcake
Oatmeal
Oats
Obelix
Oberon
Oberon Casimir Badpaintjob
Oberon The Wonder Gut (Lord of the Faery Cats)
Oberon-Smiley
Obi
Obi Wan Kenobi
Obijuan
Obsidian
Obsididan
Obstinate
Ocabar
Occi
Occupant
Ocelot
Oci Osborne
Ocitar
Octavia
October
Odan
Odd
Oddibe
Oddly McStrange
Odeipus
Odessa
Odette
Odie
Odile
Odin (Viking mythology: the allmighty god)
Odo
Odyssey
Oedipus
Ofel
Ofelia
Off!
Off-License
Often
Og
Ogden
Ogies (Afrikaans for “Little eyes”)
Ogopogo
Oh Arrogant One
Oh Captain My Captain
Oh Oh
Oh-lee
Oi!
Oingo
Oink
Okee
Okesha
Oki
Okie
Okinawa
Oklahoma
Okra
Oksana
Ol’ Buddy
Ol’ Sport
Olaf
Old Deuteronomy
Old Grandad
Old School
Old Sweetie
Old Yeller
Olde Scratch
Oleg
Oleo
Olga
Olia
Olimpia
Olive
Oliver
Oliver Sebastian
Oliver Stone
Oliver Twister
Olivette
Olivia
Olivia Pawdancer
Olivia The Otter Cat
Olja
Olla
Ollendorff
Olli
Ollie
Ollie North
Ollie South
Olliecat
Oloff
Olsen.
Oly
Olympia DuKatKis
Omaha
O’Malley
Omar
Omar Khayyam
Omar Sharif
Omega
Omelet
Ometecuhtli (Aztec mythology: the god of duality)
Omni
Omniscious
Onassis
Ondine
One Nut
One-eyed Jack
Onion
Onions
Only
Onomatopoeia
Onyx
Onyx O’Kitty
Ooga-Booga
Ooh-la-la
Ooowwwrrraahh
Oops
Ootzsatootsie
Oozie
Opal
Opaline
Ophelia
Opie
Oprah
Oprah Anne
Oprah Whiskers
Optimistic
Opus
Orange
Orange Blossom
Orange Boy
Orange Cat
Orange Juice
Orange Kitty
Orange Pico
OrangEndymion
Oranges
Orangie
Orangina
Orangy
Orbit
Orca
Ord
Ordinary
Ore
Oregano
Oreo
Oreo Bigfoot Thunderkitty
Oreo Purrowitz
Organa (named after Princess Leia Organa)
Orion
Orlando
Orlon
Orman
Ornery
O’Roy
Orphan
Orphan Annie
Orphelia
Orpheus
Orpheus And Euridice
Orsino
Orson
Orville
Orville And Wilbur
Orvis
Osborn
Oscar
Oscar Mayer
Oscar Pisser
Osgood
Oshi
Osirira
Osiris
Oslo
Osman
Oso
Oswald
Otari
Othello
Other
Other Guy
Otis
Otter
Otto
Oui
Ouija
Ouisa (oh-wee-sah)
Our Gigi
Outlaw
Outrigger
Ouzo
Oven Mitt
Overboard
Overdrive
Ovid
Ow!
Owas-sa
Owen
Owl
Ox
Oxford
Oyen
Oz
Ozone
Ozu
Ozymandius
Ozzie
Ozzy
Ozzy Pawsburn