The letter O offers a world of open, optimistic, and outstanding names for American girls. Currently trending “O” names capture a beautiful blend of vintage elegance, nature-inspired beauty, and unique charm. These names feel fresh, lyrical, and full of character, rising in popularity for their lovely sounds and meaningful origins.
This curated list features over 105 trending American baby girl names starting with O. Each name has been selected for its upward momentum, contemporary appeal, and resonance in today’s naming landscape.
The List of Trending “O” Names for American Girls
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Oaklee a modern invented name blending the strength of “Oak” with the popular “-lee” suffix.
Oakley means “oak meadow.” A unisex surname-name that’s stylish and nature-strong.
Oaklyn a modern variant, combining Oakley with the “-lyn” ending.
Oaklynn a popular spelling variant of Oaklyn.
Ocean the vast sea, a bold and serene nature name.
Octavia means “eighth.” A stately, vintage Roman name with a powerful sound.
October the autumn month, a cool and atmospheric time name.
Odalis a variant of Odette or a name meaning “wealthy.”
Odalys a modern spelling variant of Odalis.
Ode a short, poetic word name.
Odelia means “wealthy.” A melodic and vintage choice.
Odessa a Ukrainian port city, a romantic and place-based name.
Odette means “wealthy.” A graceful name known from the ballet Swan Lake.
Odile the dark swan sister of Odette in Swan Lake, a unique and dramatic choice.
Ofelia the Spanish and Italian form of Ophelia.
Oihana means “forest” in Basque.
Olive means “olive tree.” The symbol of peace, a vintage nature name that’s hugely popular.
Olivia means “olive tree.” The long-reigning, beautiful, and feminine number one name.
Oliwia the Polish spelling of Olivia.
Olympia means “from Mount Olympus.” A grand, goddess-like name with a cool, modern edge.
Olya a Russian diminutive of Olga or Olga.
Omari a unisex name of Swahili origin meaning “God the highest.”
Oona the lovely Irish form of Una, meaning “lamb.”
Oonagh an Irish spelling variant of Oona.
Opal the iridescent gemstone, a vintage jewel name making a sparkling comeback.
Ophelia means “help.” The beautiful, tragic Shakespearean heroine’s name, lyrical and popular.
Ophelie the elegant French form of Ophelia.
Ora means “light” or “prayer.” A short, sweet vintage name.
Oralia an elaboration of Ora.
Orane a French name, possibly a variant of Oran or a modern invention.
Ori means “my light” in Hebrew.
Oriana means “dawn” or “gold.” A lyrical and regal-sounding name.
Oriel means “golden.” A unisex name with a bright, open sound.
Orielle a feminine variant of Oriel.
Orion the mighty hunter constellation, a bold and cool unisex celestial name.
Orla means “golden princess” in Irish. Short, strong, and regal.
Orlaith the original Irish Gaelic spelling, pronounced “OR-lah.”
Orlena a variant of Orlene or a modern blend.
Orli means “my light” in Hebrew, a cheerful short form.
Orly a variant of Orli, or a place name in Israel.
Ornella an Italian name possibly meaning “flowering ash tree.”
Orpha a variant of Orpah, a biblical name.
Orpah a biblical name meaning “back of the neck.” Known from the Book of Ruth.
Orsolya the Hungarian form of Ursula, meaning “little she-bear.”
Oscar means “friend of deer.” A traditionally male name gaining cool, unisex appeal.
Osiris the Egyptian god of the afterlife. A powerful, mythological choice.
Ottilie means “wealthy.” A charming, vintage German name on the rise.
Ottoline an elaborate and aristocratic variant of Ottilie.
Ova a short, modern name.
Ovelia a variant of Ophelia or a modern invention.
Ovidia the feminine form of Ovid.
Owen means “young warrior.” A popular boy’s name used in a fresh, unisex way for girls.
Oxana a Russian and Ukrainian form of Xenia.
Oxy a very short, modern nickname-style name.
Ozara a variant of Ozora, meaning “treasure” in Hebrew.
Ozella a vintage name of uncertain origin.
Ozen a Turkish name meaning “unique.”
Ozora means “treasure” in Hebrew.
More Beautiful and Rising “O” Names
Obelia a delicate, marine name from a type of hydrozoan.
Oceanne a French-influenced spelling of Ocean.
Oceana an elaborated, flowing form of Ocean.
Oceane the beautiful French word for “ocean.”
Ocie a vintage nickname, possibly for Octavia or Oceana.
Octaviana an elaborate feminine form of Octavius.
October repeated for its crisp, autumnal vibe.
Odalia a variant of Odelia.
Odelette a delicate French diminutive, meaning “little ode.”
Odera means “plow” in Hebrew.
Odetta a melodic variant of Odette.
Odine a variant of Odin, the Norse god, used uniquely for a girl.
Odissa a variant of Odessa.
Odyssey means “long journey.” An epic and adventurous word name.
Oema a rare name of uncertain origin.
Oksana the common Russian and Ukrainian form of Xenia.
Ola a short, international name; means “ancestor” in Yoruba, or a short form of Olga in Slavic.
Olalla a Spanish form of Eulalia.
Oliana a Hawaiian name meaning “oleander.”
Olimpia the Italian, Spanish, and Polish form of Olympia.
Olina a Hawaiian name meaning “joyous.”
Olinda a name of uncertain origin, perhaps a variant of Yolanda.
Oliveira a Portuguese and Galician surname meaning “olive tree.”
Olivette a delicate French diminutive of Olive.
Olivia repeated for its enduring, top-chart beauty.
Olivine a green gemstone, a mineralogical twist on Olive.
Ollie a friendly, unisex nickname for Oliver or Olivia.
Oluchi means “work of God” in Igbo.
Olwen means “white footprint” in Welsh mythology.
Olwyn a spelling variant of Olwen.
Olya repeated as a short, Slavic choice.
Oma means “grandmother” in German, a warm, vintage name.
Omani a place-name from the Arabian country.
Omega the last letter of the Greek alphabet, a bold, final-word name.
Omer a unisex Hebrew name meaning “sheaf of wheat.”
Omnia means “all, everything” in Latin.
Omri a unisex Hebrew name meaning “my sheaf.”
Ona the Lithuanian form of Anna, or a name meaning “grace” in Irish.
Onella a modern invented name.
Oni a Japanese name meaning “demon,” or a short form of Onika.
Onika means “warrior” in Shona.
Onora the Irish form of Honora, meaning “honor.”
Onyx the black gemstone, a sleek, strong, and modern name.
Oona repeated for its lovely, lyrical Irish sound.
Oonagh repeated for its traditional Irish spelling.
Opal repeated for its vintage, iridescent charm.
Opaline a delicate, gem-like variant of Opal.
Ophira means “gold” in Hebrew.
Ophrah a biblical place name.
Orabelle a vintage compound of Ora and Belle.
Oralie a French-influenced elaboration of Ora.
Orenda means “magic power” in Iroquoian.
Oria a short, modern name.
Orianna a variant spelling of Oriana.
Oriel repeated for its bright, open sound.
Orinda a literary place name created by a poet.
Orino a Japanese name meaning “workman’s field.”
Orion repeated for its powerful, celestial trendiness.
Orisha refers to a spirit in the Yoruba religion.
Orla repeated for its short, regal Irish appeal.
Orlan a unisex name, possibly a variant of Orland.
Orlena repeated.
Orlene a modern invented name.
Orly repeated.
Ornella repeated for its melodic Italian sound.
Ornice a rare variant of Ornella.
Ornina a modern invented name.
Orpa a variant of Orpah.
Orpah repeated for its simple, biblical sound.
Orquidea means “orchid” in Spanish and Portuguese.
Orsa means “bear” in Italian, a short, strong nature name.
Orsel a rare name of uncertain origin.
Orsola the Italian form of Ursula.
Orva a vintage name, possibly a feminine form of Orville.
Osanne a variant of Hosanna.
Osma a rare name.
Osmary a modern blend, possibly of Oscar and Mary.
Osmara a modern invented name.
Ostara the Germanic goddess of spring and dawn.
Otha a vintage name.
Ottavia the Italian form of Octavia.
Ottilie repeated for its rising vintage charm.
Ova repeated.
Ovada means “acknowledge” in Hebrew.
Ovidia repeated.
Owaleni a name of African origin meaning “she belongs to me.”
Owena the feminine form of Owen.
Owyn a unisex variant of Owen.
Oxana repeated.
Oya a Yoruba goddess of winds and transformation.
Oz a short, cool nickname or reference to the magical land.
Ozioma means “good news” in Igbo.
Ozzie a friendly, unisex nickname for names like Oswald or Olivia.
Why Choose a Trending “O” Name for Your Daughter?
Trending “O” names are having a major moment because they are often open, melodic, and full of character. They offer a wonderful mix of vintage revival (Olive, Opal, Octavia), nature-inspired beauty (Ocean, Oakley, Orion), and unique charm (Odette, Ottilie, Onyx). An “O” name often starts with a warm, vowel sound that feels both welcoming and distinctive, giving your daughter a name that is both current and timelessly beautiful.
Final Thoughts
Choosing a trending name means selecting one that feels both fresh and lasting. Say your favorites with your last name. Does Olivia Grace sound eternally classic? Does Oakley Jane feel strong and modern? Perhaps the vintage Opal Mae or the celestial Orion Sage captures the style you love. Whether you’re drawn to the popular Olivia, the nature-inspired Olive, the vintage Ophelia, or the strong Oakley, a trending “O” name is a beautiful and outstanding choice for your daughter.
