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Unique Names that Start With O

Updated October 2026

Names159

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Total Names159

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Showing 41–60 of 159

Oaklen
Modern invented name
"oak land"
Gentle but mighty, Oaklen is one of the "Oak" names that are currently on trend. Inspired by the surname Oakland, it entered the UK Top 1000 in 2022. While Oakley remains the most popular choice by…
Orrin
Variation of Odhrán, Irish
"little pale green one"
With a cool color meaning and a woodsy, earthy feel, this anglicized spelling of the Irish name Odhrán could rise in popularity thanks to Olympic rugby player, Orrin Bizer. The name did rank in the…
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…
Oak
English tree name
"tree from the genus Quercus"
Oak, a symbol of solidity, strength, and longevity, is joining Cedar and Pine as a viable name, one that would work especially well in the middle. If you'd prefer to take the longer route to the…
Oakes
English
"near the oaks"
One part nature name, one part surname name. Oakes gives you the best of both worlds.
Oshea
Hebrew
"salvation"
Variation of Hosea.
Orla
Irish
"golden princess"
Orla is an Irish name closely associated with the high king Brian Boru, as it was the name of his sister, daughter and niece. It was very popular in the Middle Ages – the fourth most popular name in…
Othniel
Hebrew
"lion of god, or strength of god"
Othniel is mentioned in the Bible and Tanakh (in the Book of Judges) where he is the first of the biblical judges mentioned. Othniel was related to Caleb, which might make these two names a nice…
Oona
Irish, variation of Una
"lamb"
Oona is a name made famous by Eugene O'Neill's daughter, who became Charlie Chaplin's wife. One of the original Oona's granddaughters was named after her, and is now an actress famous in her own…
Odysseus
Greek mythology name
"wrathful"
The name of the brave, resourceful hero of Homer's epic saga, Odysseus is associated with hatching the Trojan Horse plot, and with his long and challenging journey home to his kingdom. Possibly…
Oaks
English
"oak tree"
A cool, nature-inspired surname for someone who lived near an oak tree or in an oak wood, also spelled Oakes.
Odelia
Hebrew, German
"I will praise the Lord or wealth"
Pretty Hebrew name that would create a strong but feminine impression, as well as a variant of the Germanic name Odilia or Ottilie.
Olga
Slavic variation of Helga, Norse
"holy"
This Slavic form of the Norse name Helga is a classic in many Slavic countries, including Russia and Poland, where it currently ranks within the Top 100 girl names. It has historically ranked among…
Olen
Variation of Ole and Olena, Scandinavian, Russian, Dutch, "ancestor's relic; eagle; pebbly forest"
"ancestor's relic; eagle; pebbly forest"
Concise and worldly, Olen may be viewed as either an elaboration of Ole or a masculine form of Olena, both of which are Scandinavian names, ultimately derived from the Old Norse Óláfr. Alternatively,…
Oceana
Greek
"ocean"
If you're a lover of the beach and sea, and want a name that relates to the largest body of water, there are several variations you could consider. Oceana is the female form of Oceanus, the god of…
Omri
Hebrew
"my sheaf"
Old Testament name of a king of Israel, related to the harvest.
October
English word name
"month name"
What is so rare as a month named June? October – and November and December – are a lot rarer. Brisk and substantial, they're so much more memorable and modern than April or May. October got its name…
Oleander
Botanical name
The name of this pretty Mediterranean shrub is reminiscent of popular classic Oliver, and interestingly its etymology appears to overlap too: oleander most likely derives from Greek rhododendron…
Oisin
Irish
"little deer"
Oisin is one of the most popular Irish baby names in its native land, though largely unknown in the US. The original Oisin was the mythological son of Finn McCool and Sadb, the goddess who was…
Odyssey
Greek
"story of Odysseus; long journey"
Literally, the Odyssey is Homer's epic tale of Odysseus's long voyage home from the Trojan wars, but more figuratively, it is used to describe any long, challenging, or eventful journey. A rare…

Unique Names that Start With O

Oaklen

Orrin

Ollie

Oak

Oakes

Oshea

Orla

Othniel

Oona

Odysseus

Oaks

Odelia

Olga

Olen

Oceana

Omri

October

Oleander

Oisin

Odyssey