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English Names that Start With O

Updated October 2026

Names35

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Total Names35

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About this list

There are 35 English names that start with the letter O for boys and girls, including Oakley, Olive, Oscar, Oakley, Ozzy, Ocean, Ollie, Ozzie, Oswald, Ollie, Oakes, Ozzy, Opie, Odell, Oberon, Oswin, Osmond, Osric, Ogden, and Osborn.

The names

Showing 1–20 of 35

Oakley
English
"oak wood or clearing"
Oakley, with its nature name roots and its Annie Oakley charm, is a hot name for both genders but more than twice as popular for girls. This name made it into the Top 1000 for the first time in 2013,…
Olive
English, from Latin, nature name
"olive tree"
Though greatly overshadowed by the trendy Olivia, Olive has a quiet, subtle appeal of its own -- and is now enjoying a remarkable comeback. Olive is one of only four girl names starting with O on the…
Oscar
English or Irish
"God spear, or deer-lover or champion warrior"
Oscar is one of the most stylish Old Man Names of our era. While it's softened slightly in popularity over the past 20 years, that may be considered a very good thing. In the nineties and the…
Oakley
English
"oak wood or clearing"
As sturdy as Oak, but with stronger roots as a first name, Oakley ticks lots of boxes for modern trends. With its unisex vibe, its nature-based meaning, its surname-y feel, and its popular -lee…
Ozzy
Pet form of Oswald, Osborn, Osmond or Oscar, English
"divine; deer"
Cute but cool, fresh but familiar, Ozzy was one of the fastest-rising boy names of 2021 and has continued to rise in the US and the UK ever since. While hard-core rocker Ozzy Osbourne might not be…
Ocean
English, nature name
"ocean"
Nature names like Ocean and River are flowing back into favor, especially with nature lovers and green-oriented parents. In 2024, it was given to 483 boys and 325 girls, making this a unisex favorite…
Ollie
Diminutive of Oliver, Latin
"olive tree"
Ollie is the versatile go-to nickname for the hugely popular Oliver, though the large majority of parents prefer to have the more formal name on the birth certificate. Even in the UK where nickname…
Ozzie
Diminutive of Osmond, Oswald, or Oscar
"divine; deer"
Ozzy has been on the rise in recent years and currently sits in the Top 1000 in the UK and the US. The Ozzie spelling has yet to catch up, but has nevertheless gained more attention thanks to its…
Oswald
English
"divine power"
Despite the success of so many O-starting boys names --Oliver, Owen, Otis, Oscar--Oswald has not yet shown any signs of resurrection, though he does have the animating nicknames Ozzie/Ozzy and Oz.…
Ollie
Short form of Olive or Olivia, Latin
"olive tree"
Less used than Liv or Livvy, Ollie is a boyish nickname for girls, sometimes used for Olivia and Olive. Currently out of the US charts, you might be surprised to learn that Ollie actually ranked more…
Oakes
English
"near the oaks"
One part nature name, one part surname name. Oakes gives you the best of both worlds.
Ozzy
Short form of Oscar or Osborn, English or Irish
"deer; divine"
This grandpa-esque nickname, traditionally short for masculine names like Osmond, Oscar, or Oswald, is starting to get traction on its own, thanks to its cool, zippy sound. In the Top 1000 for boys…
Opie
Diminutive of Opal or Osborn
Reminiscent of more familiar 'nickname' style names, like Odie, Toby, and Coby, Opie has been notably borne by clarinet player Opie Cates, artist Opie Ortiz, and by the characters Opie Taylor from…
Odell
English
"of the valley"
Bland compared to the Irish-sounding O-starting names, but fans of football star Odell Beckham Jr. may like the name for other reasons.
Oberon
Variation of Auberon
"elf king; noble bear"
The Shakespearean character Oberon in A Midsummer Night's Dream is King of the Fairies, but the name, with its bold 'O' beginning has plenty of strength alongside its magical qualities. Oberon was…
Oswin
Old English
"God's friend"
Ancient name, near obsolete now, but could make a good alternative to Owen for the adventurous baby namer. Doctor Who fans will recognize this as part of his companion's name, Clara Oswin Oswald.
Osmond
English
"divine protection"
Once too tightly tied to the aging musical clan featuring Donny and Marie, Osmond may now be able to escape that association and join the cooler group of Os and Oz names, which include Osgood, Ozias,…
Osric
English
"divine ruler"
Clad in armor. But while this name may have been forbiddingly antiquated not that long ago, the connection to the trendy nickname Os or Oz makes it a real possibility.
Ogden
English
"from the oak valley"
Rarely used surname, associated with humorous poet Ogden Nash.
Osborn
English
"divine bear; divine warrior"
A surname style choice that could get you nicknames Bear and Ozzy, which is pretty cool. It comes from the Old English variant of the Old Norse Ásbjǫrn, which was introduced to England after the…

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