Baby Names That Start With O
39 baby names begin with O here: 19 boy names, 18 girl names and 2 unisex names. Greek and English are the commonest of the 18 origins on this letter. Oliver, Olivia and Oscar are among the 4 that the US Social Security Administration currently ranks.
All Names Starting With O
| Name | Gender | Origin | Meaning |
|---|---|---|---|
| OaklandEnglish | Boy | English | Land of oaks |
| OakleyEnglish | Unisex | English | Oak tree meadow |
| OaklynnEnglish | Girl | English | Beautiful oak tree |
| OceanGreek | Unisex | Greek | Sea, the great water |
| OceanaGreek | Girl | Greek | Of the ocean |
| OctaviaLatin | Girl | Latin | Eighth |
| OctoberLatin | Girl | Latin | Eighth month |
| OdeliaGerman | Girl | German | Wealth, fortune |
| OdessaGreek | Girl | Greek | Long journey |
| OdetteFrench/Germanic | Girl | French/Germanic | Wealth, fortune |
| OdinNorse | Boy | Norse | Fury, inspiration |
| OlgaRussian | Girl | Russian | Holy, blessed |
| OliveEnglish | Girl | English | Olive tree |
| OliverPopularLatin | Boy | Latin | Olive tree |
| OliviaPopularLatin | Girl | Latin | Olive tree |
| OllieLatin | Boy | Latin | Olive tree |
| OlympiaGreek | Girl | Greek | From Mount Olympus |
| OmarArabic/Hebrew | Boy | Arabic/Hebrew | Flourishing, long-lived |
| OmariSwahili | Boy | Swahili | God the highest, flourishing |
| OnyxGreek | Boy | Greek | Black gemstone, claw |
| OonaIrish | Girl | Irish | Lamb, unity |
| OpalEnglish | Girl | English | Gem, jewel |
| OpheliaGreek | Girl | Greek | Help, advantage |
| OraHebrew | Girl | Hebrew | Light |
| OrenHebrew | Boy | Hebrew | Pine tree |
| OrianaLatin | Girl | Latin | Golden, dawn |
| OrionGreek | Boy | Greek | Hunter, rising in the sky |
| OrlaIrish | Girl | Irish | Golden princess |
| OrlandoItalian/Germanic | Boy | Italian/Germanic | Famous throughout the land |
| OscarPopularIrish/Old English | Boy | Irish/Old English | Friend of deer, divine spear |
| OsirisEgyptian | Boy | Egyptian | God of the afterlife |
| OsmanTurkish | Boy | Turkish | Bone setter, chosen one |
| OswaldOld English | Boy | Old English | Divine power, God's rule |
| OtisGerman | Boy | German | Wealth, fortune |
| OttilieGerman | Girl | German | Prosperous in battle |
| OttoGermanic | Boy | Germanic | Wealth, prosperity |
| OwenPopularWelsh | Boy | Welsh | Young warrior, well-born |
| OziasHebrew | Boy | Hebrew | My strength is the Lord |
| OzzyEnglish | Boy | English | God's power, divine spear |
O-names open with a round, generous sound that feels both classic and current. Oliver and Olivia have been trading places atop global charts, connected by the ancient olive tree symbol of peace. Oscar brings Scandinavian championship spirit, and Owen carries Welsh nobility. Though the collection is select, every O-name punches well above its weight.
Boy Names Starting With O
Chart-leading Oliver, champion Oscar, and noble Owen — a select but heavyweight collection of Latin and Welsh boy names.
Girl Names Starting With O
Globally dominant Olivia, Shakespearean Ophelia, and symbolic Olive — girl names united by the ancient olive tree of peace.
Baby names starting with O: FAQ
How many baby names start with O?
39 in this collection: 19 boy names, 18 girl names and 2 unisex names. That is what this catalogue holds today rather than every name in use anywhere — entries are added over time, and the figures on this page are counted from the dataset, so they move with it.
What are popular boy names starting with O?
19 boy names here begin with O, among them Oliver, Oscar, Owen. Popularity is name by name rather than by letter, so each entry links to its own page with the US rank and the number of births in the latest year the Social Security Administration published.
What are popular girl names starting with O?
18 girl names here begin with O, among them Olivia. As with the boy names, the ranking belongs to the individual name and not to the letter it starts with.
Are there unisex names that start with O?
2 of the 39 names on this page are given to boys and girls alike: Oakley, Ocean. A name counts as unisex here when both spellings appear in the US data rather than by tradition alone.