This list has 38 male cat names that start with O, from “Oakley” to “Ozone”. The names come from nature, mythology, gemstones, food, cartoons, and everyday nicknames. You can use them to name a new kitten, rename a rescue, or find a fitting name for a cat with a particular coat or personality.
Male cat names are the names owners give to tomcats, and they often reflect a cat’s looks, mood, or a favorite story. Many are borrowed from famous figures, like “Odin” from Norse myth or “Oreo” from the black-and-white cookie that suits tuxedo cats.
Below you’ll find the table with the name, origin, pronunciation, meaning, and description of each option.
Name: The cat name itself, listed in alphabetical order so you can scan quickly and spot the options that catch your eye.
Origin: The language or culture the name comes from, which helps you pick a name with a background that matters to you.
Pronunciation: A simple guide to saying the name out loud, so you feel confident calling it across the house.
Meaning: What the name originally meant or where it comes from, which adds a story to the name you choose.
Description: A short note on the kind of cat that suits the name, based on coat color, looks, or personality.
Male cat names
| Name | Origin | Pronunciation | Meaning |
|---|---|---|---|
| Oakley | English | OAK-lee | From the oak tree clearing |
| Oatmeal | English | OAT-meel | Porridge grain |
| Obi | Igbo / Star Wars | OH-bee | Heart; from Obi-Wan |
| Oberon | English / Shakespearean | OH-buh-ron | King of the fairies |
| Ocelot | Nahuatl | AH-suh-lot | Jaguar of the field |
| Odie | English | OH-dee | Wealthy protector |
| Odin | Norse | OH-din | Frenzy or inspiration |
| Odysseus | Greek | oh-DISS-ee-us | Wrathful or angry |
| Ogden | English | OG-den | Oak valley |
| Oliver | Latin / English | OL-ih-ver | Olive tree |
| Ollie | English | OL-ee | Olive tree |
| Olaf | Norse | OH-lahf | Ancestor’s descendant |
| Onyx | Greek | ON-iks | Claw or nail |
| Opie | English | OH-pee | Short for Theophilus |
| Opal | Sanskrit | OH-pul | Precious stone |
| Orion | Greek | oh-RYE-un | Hunter |
| Orlando | Italian | or-LAN-doh | Famous throughout the land |
| Oreo | American | OR-ee-oh | Cookie brand |
| Orville | French / English | OR-vil | Golden town |
| Oscar | Irish / Old English | OS-ker | Deer lover or divine spear |
| Otis | Greek / German | OH-tiss | Wealth or prosperous |
| Otto | German | AH-toh | Wealth or fortune |
| Ozzy | English | AH-zee | Divine power |
| Ozzie | English | AH-zee | Divine power |
| Oswald | Old English | AHZ-wald | Divine power |
| Owen | Welsh | OH-en | Young warrior or well-born |
| Ozzy Bean | American | AH-zee been | Divine power plus a bean nickname |
| Oro | Spanish | OR-oh | Gold |
| Oakes | English | OHKS | Oak trees |
| Ogre | English | OH-gur | Giant monster |
| Olympus | Greek | oh-LIM-pus | Home of the gods |
| Omar | Arabic | OH-mar | Flourishing or long-lived |
| Onslow | English | ONZ-low | Hill of the zealous one |
| Oggy | English | OG-ee | Playful nickname |
| Olly | English | OL-ee | Olive tree |
| Orangey | English | OR-in-jee | Orange colored |
| Orbit | Latin | OR-bit | Path around a body |
| Ozone | Greek | OH-zohn | To smell |
Descriptions
Oakley
A sturdy, friendly name for a strong, grounded tabby or a cat who loves lounging in sunny spots. It suits a calm, dependable companion.
Oatmeal
A cozy name for a cat with a creamy beige or cream coat. It fits a soft, warm-looking feline.
Obi
Short for Obi-Wan Kenobi or the Igbo word for heart. It suits a wise, calm cat with a dignified air.
Oberon
The fairy king from A Midsummer Night’s Dream. It suits a regal, mischievous cat who rules the household.
Ocelot
Named after the spotted wild cat of the Americas. It’s a natural pick for a cat with bold spots or a wild look.
Odie
Best known as the lovable dog in Garfield. It works for a goofy, good-natured cat.
Odin
The chief god of Norse mythology. It suits a powerful, commanding cat, especially one with a missing eye or a dramatic personality.
Odysseus
The clever hero of Homer’s Odyssey. It suits a wandering, adventurous cat who always finds his way home.
Ogden
A quirky, old-fashioned name. It fits a cat with a distinctive, gentle personality.
Oliver
A classic and popular cat name, tied to peace. It suits a sweet, friendly cat, especially a ginger one.
Ollie
A cheerful short form of Oliver. It suits a playful, energetic cat.
Olaf
A Scandinavian name made famous by the snowman in Frozen. It fits a fluffy white cat.
Onyx
Named after the black gemstone. It’s a classic pick for a sleek, jet-black cat.
Opie
Made famous by the red-haired boy on The Andy Griffith Show. It suits a freckled, sweet-natured ginger cat.
Opal
A gemstone known for shifting colors. It works for a cat with an iridescent or multicolored coat.
Orion
The hunter constellation in the night sky. It suits a bold, athletic cat, or one with a star-like marking.
Orlando
The Italian form of Roland. It fits a showy, charming cat who loves attention.
Oreo
Named after the black-and-white cookie. It’s a favorite pick for tuxedo or bicolor cats.
Orville
Linked to aviation pioneer Orville Wright. It suits a cat who loves to climb and leap.
Oscar
A popular name tied to the famous awards and Oscar the Grouch. It suits a grumpy or distinguished cat.
Otis
A warm, soulful name. It suits a big, laid-back cat with a relaxed attitude.
Otto
A palindrome name with a retro charm. It suits a solid, dignified cat.
Ozzy
Short for Osborne or Oswald, and associated with Ozzy Osbourne. It fits a wild, noisy cat with a rock-star personality.
Ozzie
A variant spelling of Ozzy, also a nickname for Australians. It suits a spirited, energetic cat.
Oswald
A classic name with a vintage feel. It suits a distinguished older cat.
Owen
A gentle Welsh name that’s growing in popularity. It suits a sweet, loyal cat.
Ozzy Bean
A playful pet name. It suits a small, round cat with a goofy side.
Oro
The Spanish word for gold. It’s a good fit for a golden or orange-coated cat.
Oakes
A strong, nature-based name. It suits a sturdy, rugged cat.
Ogre
A humorous name for a big cat with a grumpy face. It’s often a joke name for a gentle giant.
Olympus
Named after the mountain of the Greek gods. It suits a grand, majestic cat.
Omar
A traditional name with a dignified feel. It suits a wise, steady cat.
Onslow
Best known as the character from Keeping Up Appearances. It fits a cat with a gruff, comical charm.
Oggy
From the cartoon cat Oggy in Oggy and the Cockroaches. It suits a cheeky, mischievous cat.
Olly
A friendly variant of Oliver. It suits a lively, affectionate cat.
Orangey
Named after the orange cat actor in Breakfast at Tiffany’s. It fits a marmalade-colored cat.
Orbit
A name for a cat who zooms in circles around the house. It suits a hyperactive, curious cat.
Ozone
A fun, airy name for a quick, fresh-faced cat. It suits a light, playful pet.