Cat Names That Start With O
Every cat name in our database that begins with the letter O — boy names, girl names, and unisex picks. Each entry includes meaning, cultural origin, gender, and breed-friendly notes.
Use the A-Z bar to switch starting letter, or view the full A-Z dictionary. Click any name to see its full profile with related suggestions.
| Name | Meaning | Gender | Origin |
|---|---|---|---|
| O-Ren Ishii | after the character in the Kill Bill movie | Unisex | |
| O.B. | Unisex | ||
| O.B. (Orange Boy | Unisex | ||
| O.C. | Ordinary Cat | Unisex | |
| O.F.C. | Our First Cat | Unisex | |
| O.J. | Short for orange juice. | Male | |
| O.J. Simpson | Son Of Simon | Unisex | |
| O.N.N.A.O. | Oh No, Not Another One | Unisex | |
| O.T.M. | Unisex | ||
| O'Malley | Male | ||
| Oaf | Clumsy fool | Unisex | |
| Oakes | from the oak-tree grove | Male | English |
| Oakichobi | Unisex | ||
| Oakii | Unisex | ||
| Oakley | from the oak meadow | Male | English |
| Oasis | Desert water source | Male | |
| Oatcake | Unisex | ||
| Oatmeal | Cooked oat porridge | Male | English |
| Oats | Cereal grain | Unisex | English |
| Obediah | Serves God | Unisex | |
| Obelix | pillar of strength | Male | |
| Oberon | noble, bearlike | Male | English |
| Oberon-Smiley | Unisex | ||
| Obi | heart | Male | African |
| Obi Wan Kenobi | Ibo Of Nigeria Name Meaning "Heart." | Unisex | |
| Obie | O.B. | Unisex | |
| Obijuan | Unisex | ||
| Obleana | Unisex | ||
| Obo | Unisex | ||
| Oboe | Unisex | ||
| Obrien | descendant of Brian | Male | Irish |
| Obsidian | Black volcanic glass | Unisex | Greek |
| Obsididan | Unisex | ||
| Obstinate | Unisex | ||
| Ocabar | Unisex | ||
| Occi | Unisex | ||
| Occupant | Unisex | ||
| Ocean | Ocean | Male | |
| Ocelot | Unisex | ||
| Ocho Cinco | Unisex | ||
| Oci Osborne | Small wild cat | Unisex | |
| Ocitar | Unisex | ||
| Octavia | eighth | Female | Latin |
| Octavius | eighth | Male | Latin |
| Octo | Unisex | ||
| October | eighth | Female | Latin |
| Octopussy | Unisex | ||
| Odan | Wealthy Defender | Unisex | |
| Odd | Sword's Point | Unisex | Norwegian |
| Oddball | Eccentric person | Unisex | English |
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