An outstanding cat deserves an outstanding name. If you’re on a quest for a name that is anything but ordinary, then you’ve come to the right place. From Oscar to Orzo, we’ve organized our favorite cat names that start with “o” right here to help you on your journey.
Among these names, you’ll find the highest-ranking names in Rover’s databases, adorable names, and epic names all starting with the letter “o.” So, whether your cat is overzealous and playful or austere and elegant, you’re sure to find inspiration below!
Top 20 Male Cat Names Starting with “O”
Let’s start with the most popular names, pulled right off the top of Rover’s national name database. Numbers don’t lie, and it’s easy to see why people are obsessed with these classics. Do you prefer Orion, or is your cat more of an Oreo?
- Oliver
- Oscar
- Ollie
- Oreo
- Otis
- Ozzy
- Onyx
- Odin
- Otto
- Orion
- Ozzie
- Opie
- Olaf
- Obi
- Oakley
- Owen
- Odie
- O’Malley
- Oskar
- Oslo
Adorable Names that Start with “O” for Male Cats
Looking for something for an outgoing, loving cat? These adorable names are perfect for the cat that pulls at your heartstrings. From oddities like Onion to clever names like Opus, you’ll find all kinds of cute names here.
- Oz
- Oatmeal
- October
- Oolong
- Obi-Wan
- Ondre
- Onion
- Orbit
- Opus
- Ouija
- Okeli
- Oni
- Oleo
- Orzo
- Oats
- Ozark
- Oak
- Ottie
- Ontario
Epic Names that Start with “O” for Male Cats
If you’re looking for something with a little more impact, we’ve got you covered. These names are memorable and bold and sure to leave an impression. Many of them have larger than life origins in mythology, fiction, and film and will help your cat’s name shine like the star that they are.
- Osiris
- Oswald
- Odysseus
- Orson
- Oberon
- Othello
- Obsidian
- Orville
- Orlando
- Olliver
- Oswell
- Octavius
- Oxford
- Osmanthus
- Orin
- Oisin
- Omari
- Oxalis
- Orwell
- Odyssey
- Ormond
- Obediah
- Ozymandias
Top 20 Female Cat Names Starting with “O”
We didn’t forget about the girls! Here are the most popular female cat names starting with “o” that are pulled right from Rover’s national name database. You’ll find names ranging from sophisticated Ophelia to perfectly sweet Ollie and everything between.
- Olive
- Oreo
- Olivia
- Opal
- Ophelia
- Onyx
- Ollie
- Oliver
- Octavia
- Oscar
- Oakley
- Ozzy
- October
- Oona
- Ozzie
- Orca
- Orchid
- Opie
- Owl
- Orange
Adorable Names that Start with “O” for Female Cats
If you are looking for a name as adorable as your cat, look no further. These names are as sweet as they are cute and would be perfect for a cat who loves to cuddle and share the love. Is your cat an Oriole, who loves to sing and talk? Or perhaps an Ohana, who loves spending time with her new family?
- Opal
- Ohana
- Oasis
- Okra
- Orchid
- Ogden
- Orca
- Olita
- Oriole
- Ochre
- Olivet
- Ombra
- Onika
- Owena
- Oprah
- Osaka
- Oralie
- Ozma
Epic Names that Start with “O” for Female Cats
Ancient Egyptians revered cats, and it’s easy to see why. The dignity and grace that cats carry themselves with is nothing short of royal. If your cat is a queen and she knows it, then one of these names might just be the perfect fit. Is she an Oleander, or an Olympia? Try one of these regal names out for size.
- Odette
- Olympia
- Odessa
- Olga
- Onyxia
- Olivine
- Olena
- Okalani
- Obera
- Olinda
- Oriana
- Odelia
- Orphia
- Oaklynn
- Oleander
- Odysseia
- Offred
- Omaira
- Orella
- Osmunda
We’re overjoyed to share our favorite cat names that start with “o” with you, and hope they offer inspiration in your naming journey. Whether you go with Oz or Oreo, your cat is sure to wear their new name with pride. Whatever name you choose, enjoy this special time with your new cat!
New Cat Resources
A new cat brings joy, laughter, and lots of love into a home. It’s a magical time where precious memories are created as you first bond with your new cat. It can also raise a lot of questions and unexpected challenges, too. Don’t worry, though. We’ve got you covered. Check out the links below to learn more about how to care for a new cat and make this transition as fun and easy as possible.
- How to Introduce a Kitten to a Cat
- How to Litter Train a Kitten
- How Long Can You Leave a Kitten Alone?
- Can Cats Eat Human Food?
- How to Survive the First 24 Hours with Your New Kitten
Find a Great Name for Your Cat on Rover
If you didn’t find the perfect name in this list, don’t worry. We’re obsessed with names here at Rover and have so many more ideas to fuel your journey. Check these articles out for even more cat name ideas and inspiration.
