127 Names That Start With O for Boys

Welcome to the world of adorable names and the letter O. Choosing the perfect name for your little one can be a delightful adventure, and what better way to begin this journey than by exploring a collection of names that start with the 15th letter of the alphabet. The letter O offers a variety of options, from the classic to the unique, each one carrying its own charm.

Whether you’re continuing a family tradition or simply drawn to the elegance of O names, you’re sure to find a name that will make your little one shine brighter than the ocean itself.

We turned to our Mum’s Grapeviner community, with insights from over half a million mums, to gather the most darling O names.

O Names with a Theme

Themes are a great way to find inspiration, and the letter O delivers with a variety of options. Whether you’re looking for nature-inspired names, celebrity-approved choices, or something with a vintage flair, O has it all.

• Nature-inspired: Orion, Oakley, Ocean, Otter, Osprey, Onyx, Otis, Osborn, Olive, Orchid, Oasis, Opal
• Place-inspired: Orlando, Oslo, Oakland, Odessa, Ottawa, Oahu, Oxford, Ontario, Orleans, Oman
• Vintage-inspired: Oswald, Orville, Orson, Omer, Odis, Octavius, Oswin, Obed, Ozro, Osric
• One-syllable: Osh, Ode, Om, Oll, Orr, Oan, Oak, Oz, Orb, Onn

Boy Nicknames That Start With O

Australians are known for their love of nicknames, often shortening or adapting names to create something unique. The letter O has some cute contenders that are short, sharp, and full of character:

• Ollie
• Oak
• Ozzie
• Ox
• Oz
• Om
• Ovie
• Ozzy
• Oli
• Ott

Iconic O Names

Pay homage to one of these iconic figures with a name that carries a sense of history and style. From designers and artists to celebrities, these O names are hard to overlook:

• Orlando: a celebrity-inspired name, after actor Orlando Bloom.
• Ozzie: after American rockstar Ozzie Osbourne
• Oscar: a literary name, after the novelist Oscar Wilde
• Orson: after American actor, director and writer Orson Welles
• Obi: May the Fourth be with your little one with this Star Wars inspired name, after Obi-Wan Kenobi
• Oleg: a French name, after designer Oleg Cassini know for his work with Jacqueline Kennedy
• Otto: A classic name with a royal touch, often used by European nobility
• Omar: A strong name inspired by actor Omar Sharif

Unique O Names

If you’re looking for something truly distinctive, these unique O names are sure to turn heads. Each one offers a rare and memorable quality:

• Othello
• Oziel
• Obadiah
• Olan
• Osias
• Octavian
• Oberon
• Osgood
• Ozias
• Orel

Pairings for O Names

If you’re partial to hyphenated names, consider these cool pairings that combine the letter O with other classic or modern names:

• Ollie-James
• Otto-John
• Oliver-Lee
• Osias-Ryan
• Oscar-Thomas
• Otis-Jackson
• Orion-Jay

Celebrity Sons with O Names

Celebrities often choose unique and memorable names for their children, and O names are no exception. Here are some famous examples that might inspire you:

• Carrie Bickmore’s son, Oliver
• Maya Rudolph’s son, Orson
• Nikki Reed’s son, Ocean
• Mandy Moore’s son, Oscar
• Tobey Maguire’s son, Otis
• Luke Cook’s son, Ozzie
• Gordan Ramsay’s son, Oscar
• Missy Peregrym’s son, Otis
• Jason Sudeikis’ son, Otis
• Kyle Sandilands’ son, Otto
• Milla Jovovich’s son, Osian

 

View this post on Instagram

 

A post shared by Carrie Bickmore (@bickmorecarrie)

 

View this post on Instagram

 

A post shared by Mandy Moore (@mandymooremm)

 

View this post on Instagram

 

A post shared by Gordon Ramsay (@gordongram)

More names that start with O

If your heart is set on an O name, here are even more of our favourites to inspire you: