Choosing the perfect name for your equine companion can be a delightful yet challenging task. Whether you’re naming a new foal, a newly acquired horse, or looking for inspiration for your fictional equine character.
This comprehensive list of over 400 horse names that start with O is sure to provide you with plenty of options.
From famous racehorses to cute and funny monikers, we’ve got you covered with a wide array of choices to suit every horse’s personality and your personal preferences.
Famous Horse Names That Start With O
- Omaha – Winner of the 1935 Triple Crown
- Octagonal – Australian Racing Hall of Fame inductee
- Ouija Board – Multiple Group 1 winning mare
- Ormonde – Undefeated British racehorse
- Orfevre – Japanese thoroughbred champion
- One For Arthur – 2017 Grand National winner
- Officer – American Grade 1 stakes winner
- Oaklawn Warrior – Notable American racehorse
- Octave – Multiple Grade 1 winning filly
- Olympiad – American Grade 1 winner
- Oasis Dream – British Group 1 winner and successful sire
- Oratorio – Irish-trained Group 1 winner
- Orchestrated – Canadian Horse Racing Hall of Fame inductee
- Oxbow – 2013 Preakness Stakes winner
- Ocean Knight – Graded stakes winner
- Ogygian – American Grade 1 winner
- Outstrip – Breeders’ Cup Juvenile Turf winner
- Oscar Performance – Multiple Grade 1 winner on turf
- Optimus Prime – Named after the Transformers character
- Overbury – British Group 1 winner
- Olden Times – European champion miler
- Oiseau de Feu – French Group 1 winner
- Our Emblem – Sire of Kentucky Derby winner War Emblem
- Owl – 1960s American stakes winner
- Oz the Terrier – Australian Group 1 winner
- Overskate – Canadian Horse of the Year
- Owendale – Multiple graded stakes winner
- Osunitas – California-bred stakes winner
- Old Rosebud – 1914 Kentucky Derby winner
- Orientate – Breeders’ Cup Sprint winner
- Oguri Cap – Japanese champion racehorse
- Orpen – Irish Group 1 winner
- Omnium II – French classic winner
- Orange Bay – Japanese Group 1 winner
- Oasis Star – South African Group 1 winner
- Omar Khayyam – 1917 Kentucky Derby winner
- Ocean Silk – Irish-trained Group winner
- Otaki Chief – New Zealand champion
- Okawango – French Group 1 winner
- Outback Barbie – Australian Group winner
- Order Of St George – Irish St. Leger winner
- Overanalyze – Arkansas Derby winner
- Oxalic – Australian Group 1 winner
- Owendale – Multiple graded stakes winner
- Origami Angel – Japanese Group winner
- Opportunity – British Group winner
- Ostilio – British Group 2 winner
- Oscar Schindler – Irish St. Leger winner
- Obrigado – French-bred stakes winner
- Outlook – British Group 3 winner
Female Horse (Mares) Names That Start With O
- Olivia – Derived from “olive,” symbolizing peace
- Ophelia – Shakespearean character name meaning “help”
- Onyx – Black gemstone, perfect for a dark-colored mare
- Opal – Iridescent gemstone name
- Orchid – Elegant flower name
- Oceana – Relating to the ocean
- Olympia – Associated with Mount Olympus and Greek mythology
- Odette – French name meaning “wealthy”
- Oonagh – Irish name meaning “lamb”
- Oasis – A fertile spot in a desert
- Octavia – Latin name meaning “eighth”
- Ohana – Hawaiian word for “family”
- Oksana – Ukrainian name meaning “praise be to God”
- Omega – The last letter of the Greek alphabet
- Ondine – Water nymph in mythology
- Onora – Irish name meaning “honor”
- Opal Moon – Combining gemstone and celestial themes
- Oracle – A person or thing providing wise counsel
- Oriole – Colorful bird species
- Osanna – Hebrew name meaning “save us”
- Ottilie – German name meaning “prosperous in battle”
- Ozara – African name meaning “pearl”
- Oak Leaf – Nature-inspired name
- Oberon’s Queen – Reference to Shakespeare’s “A Midsummer Night’s Dream”
- Obsidian – Volcanic glass, suitable for a sleek black mare
- Ocean Breeze – Evocative of coastal scenery
- Odessa – Ukrainian city name
- Okapi – Exotic African animal
- Oleander – Flowering shrub (note: toxic to horses)
- Olive Branch – Symbol of peace
- Omega Rose – Combining Greek and floral themes
- Opal Dawn – Gemstone and time of day combination
- Opera Diva – For a mare with a loud neigh
- Opulence – Suggesting luxury and wealth
- Orange Blossom – Fragrant flower name
- Orchid Mist – Combining flower and weather themes
- Oriental Pearl – Exotic-sounding name
- Ostara – Germanic goddess of spring
- Oyster Pearl – Oceanic treasure-inspired name
- Ozella – Hebrew name meaning “God is my strength”
- Ozone – Atmospheric layer name
- Otter Creek – Nature-inspired name
- Outback Rose – Australian-themed name
- Owl Eyes – For a mare with large, expressive eyes
- Oxalis – Genus of wood sorrel plants
- Oxygen – Essential element for life
- Ozark Sunrise – Inspired by the Ozark Mountains
- Oolong – Type of tea, for a warm-colored mare
- Orinoco – South American river name
- Owyhee – After the Owyhee Desert
Male Horse Names That Start With O
- Odysseus – Greek mythological hero
- Oberon – King of the fairies in Shakespeare’s works
- Onyx Knight – Combining gemstone and chivalric themes
- Orion – Constellation and hunter from Greek mythology
- Oscar – Means “deer lover” or “champion warrior”
- Odin – Norse god of wisdom and war
- Osiris – Egyptian god of the afterlife
- Octavius – Latin name meaning “eighth”
- Oz – Fictional land or abbreviation for ounce
- Oakley – English name meaning “meadow of oak trees”
- Obadiah – Hebrew name meaning “servant of God”
- Obsidian Flame – Combining volcanic glass and fire themes
- Ocean Storm – Powerful nature-inspired name
- Ocelot – Wild cat species
- Ogma – Irish god of eloquence and learning
- Oliver – Derived from “olive tree,” symbolizing fruitfulness and beauty
- Omega Wolf – Combining Greek letter and wild animal themes
- Onomatopoeia – For a horse that makes distinctive sounds
- Opus – Musical composition or literary work
- Oracle Bones – Ancient Chinese divination tools
- Orbit – Celestial path of a planet or satellite
- Orca – Another name for killer whale
- Orwell – After the famous author George Orwell
- Othello – Shakespearean character name
- Outlaw – For a horse with a rebellious spirit
- Overdrive – Suggesting speed and power
- Oxbow – U-shaped bend in a river
- Ozymandias – Ancient Egyptian king, subject of a famous poem
- Obelisk – Tall, four-sided monument
- Oblivion – State of being unaware or forgotten
- Occam – After Occam’s Razor principle
- Oceanus – Greek Titan god of the sea
- Octane – Component of gasoline, suggesting high energy
- Oengus – Irish god of love and youth
- Ogre – Mythical monster, for a large and imposing horse
- Ohm – Unit of electrical resistance
- Omen
- Onager – Asiatic wild ass
- Opus Magnus – “Great work” in Latin
- Oracle Sun – Combining prophetic and celestial themes
- Ordo – Latin for “order” or “rank”
- Ore – Naturally occurring solid material
- Ossian – Legendary Irish warrior and bard
- Otis – German name meaning “wealthy”
- Outrider – Escort for racehorses
- Overture – Opening movement of a musical composition
- Oxus – Ancient name for the Amu Darya river
- Ozark – Mountain range in the United States
- Ozone Rider – Environmental-themed name
- Ozzy – Diminutive of Oswald, meaning “divine power”
Funny Horse Names That Start With O
- Oats McGoats – Playful reference to a horse’s diet
- Old Glue – Humorous nod to the old horse glue myth
- One Trick Pony – Ironic name for a versatile horse
- Opt-Out-asaurus – For a stubborn horse who refuses to cooperate
- Oreo Speedwagon – Pun on the band REO Speedwagon
- Ostentatious – For a horse with a flair for the dramatic
- Out To Lunch – For a spacey or easily distracted horse
- Over-Neigh-tor – Pun on “overnighter” for a vocal horse
- Odor Eater – Humorous name for a less fragrant stable mate
- Oh Behave – Austin Powers reference for a mischievous horse
- Olé Mole – Spanish exclamation mixed with a burrowing animal
- Omelet du Fromage – French phrase meaning “cheese omelet”
- On The Rocks – Cocktail reference for a clumsy horse
- One Man Band – For a horse that makes a lot of noise
- Onion Ring Leader – Fast food-inspired name for a boss horse
- Oodles of Noodles – Pasta-themed name for a curly-maned horse
- Oops I Did It Again – Britney Spears song title for an accident-prone horse
- Opera-tunity – Pun on “opportunity” for a loud horse
- Optimist Prime – Play on Transformers character for a cheerful horse
- Orange You Glad – Pun on the knock-knock joke
- Oscillate Wildly – The Smiths song title, for a horse that can’t stand still
- Ostrich Jockey – Absurd name for a tall, long-necked horse
- Otter This World – Pun on “out of this world” with an aquatic twist
- Overdraft – Banking term for a horse that eats too much
- Owie Wowie – Childish expression of pain for a clumsy horse
- Ox-y Clean – Pun on OxiClean for a neat freak horse
- Oyster Cracker – Snack food name for a small, pale horse
- Ozzy Osbourse – Pun on Ozzy Osbourne for a wild horse
- Obi-Wan Cannoli – Star Wars and Italian pastry mashup
- Obtuse Spruce – For a not-so-bright horse
- Octo-pony – Imaginary eight-legged horse
- Odd Job – James Bond character name for a quirky horse
- Off-Key Donkey – For a horse with a terrible whinny
- Ogre Achiever – Pun on “overachiever” for a large, successful horse
- Oh My Gourd – Pumpkin-themed exclamation
- Oink Oink Neigh – Confused farm animal sounds
- Olfactory Factory – For a horse with a keen sense of smell
- Olive Or Twist – Cocktail garnish pun on Oliver Twist
- Omni-corn – Play on “omnivore” and “unicorn”
- One Horse Open Sleigh – Christmas song reference
- Onion Breath – For a horse with less-than-fresh breath
- Oompa Loompa – Willy Wonka character for a small, stocky horse
- Oopsy Daisy – Childish expression for a clumsy horse
- Orbit Gum – Chewing gum brand for a horse that chews everything
- Organic Panic – For a horse that only eats organic feed
- Origami Tsunami – Japanese art form and natural disaster combo
- Ornery Corner – For a grumpy horse always standing in the corner
- Oscillating Fan – For a horse that constantly turns its head
- Ouija Broad – Pun on Ouija board for a “psychic” mare
- Oy Vey Neigh – Yiddish expression combined with a horse sound
Unique Horse Names That Start With O
- Obsidian Whisper – Evocative of dark, smooth stone and quiet strength
- Oleander Mist – Combining the poisonous plant with an air of mystery
- Oneiromancer – One who divines through dreams
- Opalescent Fury – Suggesting iridescent colors and intense energy
- Orphic Resonance – Relating to Orpheus and his mystical music
- Ossuary Enigma – Mysterious bone repository
- Ouroboros – Ancient symbol of a serpent eating its own tail
- Oblivion’s Echo – Suggestive of forgotten memories resurfacing
- Ochre Tempest – Earthy pigment combined with stormy imagery
- Odalisque – A female slave or concubine in a Turkish harem
- Oghma’s Quill – Named after the Irish god of eloquence and writing
- Ominous Rhapsody – Foreboding yet musical name
- Onomatopoeia – The formation of words that imitate sounds
- Opalite Voyager – Combining the gemstone opalite with a sense of journey
- Opus Nocturne – A nighttime masterpiece
- Oracular Zephyr – Prophetic western wind
- Osmium Dream – Named after the densest naturally occurring element
- Ozone Epitaph – Atmospheric layer combined with a memorial inscription
- Oblique Stratagem – An indirect plan or scheme
- Occidental Reverie – A daydream of the Western world
- Occulta Veritas – Hidden truth in Latin
- Ode to Oblivion – A poetic tribute to forgetfulness
- Olfactory Odyssey – A journey of scents
- Ombre Serenade – A song of graduated colors
- Omni Lumina – All lights in Latin
- Oneiric Cartographer – A mapper of dreams
- Opulent Dichotomy – Luxurious contradiction
- Orbital Phantasm – A celestial illusion
- Ossified Euphony – Hardened beautiful sound
- Oubliette Whisperer – Named after a secret dungeon with access only from above
- Obsidian Sonnet – A dark, poetic name
- Ochre Labyrinth – Maze-like pattern in earthy pigments
- Odium’s Antithesis – The opposite of hatred
- Oenophile’s Reverie – A wine lover’s daydream
- Olam Haba – “The world to come” in Hebrew
- Ombré Soliloquy – A gradient-colored monologue
- Omniscient Quasar – All-knowing celestial object
- Onomatopoeic Osmosis – Sound-based gradual absorption
- Opalescent Nebula – Iridescent cosmic cloud
- Orphic Palindrome – Mystical word or phrase that reads the same backward
- Oscillating Petrichor – Fluctuating scent of rain on dry earth
- Osseous Luminescence – Glowing bones
- Outre Phantasmagoria – Unusual, bizarre spectacle
- Oberon’s Gambit – Strategic play named after the fairy king
- Occam’s Melody – Simple, elegant tune
- Odin’s Whisper – Subtle message from the Norse god
- Oleander Zenith – Highest point of the poisonous flower
- Ominous Serendipity – Foreboding fortunate discovery
- Onyx Zephyr – Dark gemstone wind
- Opulent Cipher – Luxurious secret code
Cute Horse Names That Start With O
- Ollie – Short and sweet name
- Oreo – For a black and white horse
- Oatmeal – Soft, warm name reminiscent of a horse’s diet
- Olive – Cute name with a touch of sophistication
- Oscar the Grouch – For a horse with a grumpy but lovable personality
- Oomph – For a horse with lots of energy
- Otis – Charming, old-fashioned name
- Ozzy – Playful, rock-inspired name
- Oddball – For a quirky, unique horse
- Oopsie Daisy – Charming name for a clumsy but lovable horse
- Orbit – Cute space-themed name
- Orville – Reminiscent of popcorn, sweet and light
- Otter – Playful water animal name
- Olaf – After the lovable snowman from Frozen
- Octopus – Quirky name for a horse with long legs
- Oni – Japanese for “demon,” but sounds cute
- Okie Dokie – Cheerful, agreeable name
- Oompa Loompa – For a small, stout horse
- Orangina – Cute citrus-inspired name
- Ostrich – For a tall, long-necked horse
- Owl – For a wise-looking horse
- Ozark – Cute mountain-inspired name
- Oggy – Playful, cartoon-inspired name
- Ohana – Hawaiian for “family”
- Okra – Unusual vegetable name that sounds endearing
- Ollie Ollie Oxen Free – Playful hide-and-seek phrase
- Omelet – Cute breakfast-inspired name
- Oopsy – For a horse prone to minor mishaps
- Oregano – Herb name with a cute ring to it
- Ori – Short for “original,” sounds sweet
- Orion’s Belt – Celestial name with a touch of whimsy
- Oswald – Old-fashioned name with a cute nickname “Ozzie”
- Otter Pop – Frozen treat-inspired name
- Ouija – Mysterious but cute-sounding name
- Oven Mitt – Quirky kitchen item name
- Oyster – For a small, pearly-colored horse
- Ozzie Pozzie – Australian-inspired playful name
- Oboe – Musical instrument with a cute sound
- Octo – Short for octopus, sounds bouncy and fun
- Odette – Elegant name from Swan Lake
- Ogden – Old English name meaning “oak valley”
- Olive Oyl – Popeye’s girlfriend, for a thin, tall horse
- Ombré – For a horse with gradual color changes
- Omelette du Fromage – Cheese omelette in French, sounds adorable
- Onigiri – Japanese rice ball, cute food-inspired name
- Oopsie Woopsie – Playful name for a clumsy horse
- Orbit – Space-themed name with a cute sound
- Oreo Blizzard – Ice cream treat-inspired name
- Otus – Cute owl genus name
- Ozzy Wozzy – Playful variation of Ozzy
Best Horse Names That Start With O
- Odyssey – Epic journey-inspired name
- Onyx Shadow – Sleek, mysterious name
- Orion’s Arrow – Celestial hunter’s weapon
- Ostentatious – For a showy, impressive horse
- Oathkeeper – Noble, loyal name
- Oberon’s Pride – Fairy king-inspired regal name
- Oceanic Storm – Powerful, nature-inspired name
- Olympus Rising – Majestic, deity-inspired name
- Onward Bound – Forward-looking, determined name
- Oracle’s Vision – Mystical, prophetic name
- Obsidian Knight – Dark, chivalrous name
- Odin’s Wisdom – Norse god-inspired name
- Opulent Sunset – Rich, colorful name
- Orbital Flame – Cosmic, fiery name
- Osiris Reborn – Egyptian god of resurrection
- Outlaw’s Legacy – Rebellious, heritage-inspired name
- Overture – Musical beginning, fresh start
- Ozymandias – Ancient king, powerful name
- Oasis Mirage – Desert-inspired, illusory name
- Oblivion’s Edge – Dramatic, boundary-pushing name
- Occidental Star – Western celestial body
- Oceanus Rex – King of the ocean
- Odysseus’s Return – Homeric hero’s journey
- Olymphic Gold – Victory-inspired name
- Omni Potens – All-powerful in Latin
- Oncoming Storm – Dramatic weather-inspired name
- Opulent Destiny – Luxurious fate-inspired name
- Oracular Sonnet – Prophetic poem-inspired name
- Orbital Eclipse – Cosmic event-inspired name
- Ostentatious Rex – Showy king
- Otherworldly – Mysterious, ethereal name
- Outrider’s Glory – Celebratory escort name
- Overtaker – Competitive, race-inspired name
- Oxbow’s Revenge – River bend-inspired dramatic name
- Oxygen Blaze – Elemental, fiery name
- Ozone Rider – Atmospheric, adventurous name
- Obsidian Thunder – Dark stone and storm combination
- Occidental Zephyr – Western wind
- Octane Surge – High-energy, powerful name
- Odinson – Son of Odin, Norse mythology-inspired
- Omen’s Whisper – Subtle, prophetic name
- Onyx Tempest – Dark gemstone storm
- Opulent Warrior – Luxurious fighter
- Orbital Sentinel – Celestial guardian
- Osmium Flash – Dense element-inspired quick name
- Ostrogoth – Ancient Germanic people-inspired name
- Outlander’s Quest – Journey-inspired name
- Overlay – Artistic, layered name
- Ovation – Enthusiastic approval-inspired name
- Oxfordian – Scholarly, prestigious name
Conclusion
This comprehensive list of over 400 horse names starting with O offers a wide variety of options for every type of horse and owner preference.
From the historically significant to the whimsically cute, there’s a perfect O name waiting for your equine companion.
Remember, the best name for your horse is one that resonates with you and suits your horse’s unique personality and characteristics. Happy naming!