Girl Names That Start with O
55 namesGirl
O names for girls are relatively rare, which gives them a distinctive, memorable quality. Olivia is the best known, a name used by Shakespeare in Twelfth Night and linked to the olive tree, a symbol of peace. Olive is its simpler, vintage-feeling relative. Ophelia is the tragic heroine of Hamlet, and Ofelia is its Spanish form. Octavia comes from a Latin word for eighth and was carried by women of ancient Rome.
The letter also includes a lively group of nature names. Oaklynn, Oaklyn, Oaklee and Oakleigh all draw on the oak tree, a symbol of strength, and show how parents like to shape nature words into new names. Opal is a gemstone known for its shifting colors. Odette is the swan princess of the ballet Swan Lake, and Oriana is often linked to words for gold or dawn. Odessa takes its name from the port city on the Black Sea, and Olga is a Slavic name with Norse roots. Olyvia is a modern spelling of Olivia.
Because these names begin with a rounded vowel, they can blend with surnames that also start with a vowel. Spelling is a consideration for the oak-based names, which come in many versions, so decide early which one you prefer and say the full name aloud with your surname.
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All 55 names
Sorted by current popularity. US rank uses 2025 data for the name's most common sex; the trend compares births with five years earlier. Tap a column heading to re-sort.
| Name | Meaning | Origin | US rank 2025 | 5-yr trend |
|---|---|---|---|---|
| Olivia | olive | Latin | 1 | ↓ -23% |
| Olive | olive tree | English | 197 | ↑ +7% |
| Oaklynn | modern blend of oak and Lynn | American (modern coinage) | 153 | ↑ +89% |
| Ophelia | help | Greek | 264 | ↑ +49% |
| Octavia | eighth | Latin | 308 | ↑ +6% |
| Oaklee | oak meadow | American (modern coinage) | 535 | ↑ +20% |
| Opal | opal, the gemstone | Sanskrit | 423 | ↑ +66% |
| Oaklyn | blend of Oak and Lynn | American (modern coinage) | 637 | ↓ -13% |
| Oakleigh | oak clearing | American (modern coinage) | 668 | ↑ +34% |
| Odette | wealth, fortune | French | 883 | ↑ +109% |
| Oriana | uncertain; perhaps 'golden' | Latin | 1,791 | ↑ +38% |
| Odessa | from the Ukrainian city Odessa | Greek | 1,197 | ↑ +47% |
| Olyvia | variant of Olivia, olive tree | American (modern coinage) | 3,283 | ↓ -26% |
| Olga | holy, blessed | Russian | 3,201 | ↓ -7% |
| Ofelia | Spanish form of Ophelia, help | Spanish | 2,148 | → +2% |
| Oona | from Irish Úna, possibly lamb or unity | Irish | 2,768 | ↓ -18% |
| October | the month; from Latin for eighth | English | 3,758 | ↓ -29% |
| Odalys | Spanish-American name of uncertain origin | Spanish | 3,821 | ↑ +86% |
| Olympia | from Olympia, sanctuary of Zeus | Greek | 2,210 | ↑ +20% |
| Orianna | golden | Latin | 3,094 | ↑ +47% |
| Odalis | modern Spanish name, uncertain origin | Spanish | 9,306 | ↓ -8% |
| Orla | golden princess | Irish | 2,532 | ↑ +119% |
| Oceana | ocean | Latin | 3,562 | ↑ +59% |
| Odelia | praise God, or wealthy | Hebrew | 2,985 | ↑ +51% |
| Ora | light (Hebrew) or pray (Latin) | Hebrew | 3,760 | ↑ +18% |
| Ona | Lithuanian form of Anna, "grace" | Hebrew | 5,868 | → -4% |
| Oliva | olive; variant of Olivia | Latin | 7,059 | ↓ -30% |
| Ottilie | fortune, wealth | German | 2,951 | ↑ +200% |
| Oksana | Slavic form of Xenia, hospitality | Russian | 7,404 | ↑ +15% |
| Ola | several possible sources | Norwegian | 8,227 | ↓ -7% |
| Oralia | uncertain, possibly golden | Spanish | 8,737 | ↑ +20% |
| Onalee | blend of Ona and Lee | American (modern coinage) | 11,664 | ↓ -33% |
| Otilia | form of Ottilie, wealth | Spanish | 6,492 | ↑ +64% |
| Odilia | wealth, fortune | Germanic | 7,058 | ↑ +167% |
| Olevia | variant of Olivia, olive | Latin | — | new |
| Oneida | name of an Iroquois nation | Native American | — | new |
| Ozella | uncertain, modern Southern name | American (modern coinage) | 12,853 | ↓ -53% |
| Ova | uncertain, vintage Southern name | American (modern coinage) | — | ↓ -100% |
| Orpha | variant of Orpah | Hebrew | — | new |
| Oma | uncertain; possibly Arabic, commander | — | — | new |
| Olinda | uncertain; possibly Germanic | Portuguese | — | new |
| Oleta | uncertain; possibly from Alethea | American (modern coinage) | — | new |
| Omie | uncertain; possibly a pet form of Naomi | American (modern coinage) | — | new |
| Ottie | pet form of Ottilie or Otto | Germanic | — | new |
| Onnie | old pet name, origin uncertain | English | — | new |
| Ouida | childish form of Louisa | English | — | new |
| Onie | uncertain pet form | American (modern coinage) | — | new |
| Oda | Germanic, wealth | German | — | new |
| Oneta | uncertain; American coinage | American (modern coinage) | — | new |
| Olene | uncertain; American name | American (modern coinage) | — | new |
| Oletha | uncertain; American coinage | American (modern coinage) | — | new |
| Otelia | variant of Otilia, wealth | Spanish | — | new |
| Onita | uncertain; American name | American (modern coinage) | — | new |
| Oretha | uncertain; related to Aretha | American (modern coinage) | — | new |
| Orene | uncertain; American name | American (modern coinage) | — | new |