These 61 girls middle names that start with O span everything from chart-topping favorites to rare vintage finds, giving you a strong shortlist no matter your style.
The names are grouped into seven categories — popular, traditional, vintage, short, long, unique, and nature-inspired — so you can zero in on exactly the feel you want without scrolling through names that don’t fit.
17 Popular Girls Middle Names That Start With O
These 17 names appear regularly on birth certificates right now, which means they pair smoothly with a wide range of first names and feel immediately familiar to family members.
- Olivia oh-LIV-ee-ah
Latin olive tree; symbol of peace and fruitfulness - Ophelia oh-FEEL-ee-ah
Greek help or aid - Odette oh-DET
French, Germanic wealthy; prosperous - Opal OH-pul
Sanskrit, English precious gemstone known for iridescent color - Octavia ok-TAY-vee-ah
Latin eighth; born eighth - Olive OL-iv
Latin, English olive tree; symbol of peace - Orla OR-lah
Irish golden princess - Odelia oh-DEE-lee-ah
Hebrew, Germanic I will praise God; wealthy - Ondine on-DEEN
Latin, French little wave; water spirit - Oriana or-ee-AH-nah
Latin dawn; golden - Ottilie OT-ih-lee
Germanic prosperous in battle - Odessa oh-DES-ah
Greek long journey; wrathful - Olympia oh-LIM-pee-ah
Greek from Mount Olympus; heavenly - Ora OR-ah
Latin, Hebrew light; prayer - Oralie OR-ah-lee
French, Latin golden; dawning light - Ottoline OT-oh-line
Germanic, French prosperous; wealthy ruler - Odile oh-DEEL
French, Germanic prosperous in battle; wealthy
8 Traditional Girls Middle Names That Start With O
These 8 names have been passed down through generations and carry a sense of history and quiet reliability that works especially well as a middle name honoring family roots.
- Olivine OL-ih-veen
Latin olive tree; gemstone of green hue - Orpha OR-fah
Hebrew fawn; back of the neck - Ottavia oh-TAH-vee-ah
Latin Italian eighth; feminine form of Octavius - Odalys oh-DAH-lees
Germanic wealthy; prosperous homeland - Oona OO-nah
Irish Gaelic lamb; unity - Orenda oh-REN-dah
Iroquois magical power; spiritual force within nature - Osanna oh-ZAN-ah
Hebrew save now; praise and adoration - Orinthia oh-RIN-thee-ah
Greek she who stirs the heart; mountain bird
9 Vintage Girls Middle Names That Start With O
These 9 names peaked decades ago and are just rare enough to feel fresh again, striking that sweet spot between old-fashioned charm and genuine originality.
- Odaline OH-dah-leen
Germanic noble; variant of Odeline - Olevia oh-LEE-vee-ah
Latin olive tree; elaborated form of Olive - Olga OL-gah
Old Norse, Russian holy; blessed - Olia OH-lee-ah
Slavic holy; short form of Olga - Orena oh-REE-nah
Hebrew pine tree; light - Orsola OR-soh-lah
Latin, Italian little female bear - Osma OZ-mah
Old English divine protector - Ottilia oh-TIL-ee-ah
Germanic prosperous in battle; wealth - Ozella oh-ZEL-ah
Hebrew, American strength of God; elaborated form of Oz
10 Short Girls Middle Names That Start With O
These 10 one- and two-syllable names slot neatly between a longer first name and a multi-syllable surname, keeping the full name balanced and easy to say aloud.
- Ola OH-lah
Norse, Polish ancestor’s relic; short form of Olaf - Ona OH-nah
Lithuanian, Latin gracious; Lithuanian form of Anna - Ode OHD
Old English wealthy; short lyrical name - Oma OH-mah
Arabic, Hebrew leader; commanding one - Ova OH-vah
Latin egg; symbol of new life and beginnings - Oda OH-dah
Old German wealth and fortune - Oki OH-kee
Japanese middle of the ocean - Orsa OR-sah
Italian, Latin little bear; feminine diminutive form - Osen OH-sen
Japanese autumn; the fall season - Ovia OH-vee-ah
Latin egg-shaped; relating to new beginnings
5 Long Girls Middle Names That Start With O
These 5 names make a bold statement in the middle spot, adding elegance and rhythm when paired with a short, punchy first name.
- Oceania oh-see-AY-nee-ah
Latin, Greek of the ocean; relating to the vast sea - Odalinde oh-dah-LIN-deh
Germanic prosperous and gentle; noble lineage - Oleander oh-lee-AN-der
Latin, Greek flowering evergreen shrub; symbol of beauty - Opaline OH-pah-leen
English, Latin resembling the iridescent gemstone opal - Orsolya OR-shaw-yah
Hungarian, Latin little bear; Hungarian form of Ursula
6 Unique Girls Middle Names That Start With O
These 6 names are genuinely uncommon, giving your daughter a middle name that stands out on paper without being difficult to spell or pronounce.
- Oriel OR-ee-el
Latin, Old French golden; also a type of projecting window - Ozara oh-ZAR-ah
Hebrew treasure; wealth - Omara oh-MAR-ah
Arabic flourishing; long life - Oceane oh-say-AHN
French of the ocean; French feminine form - Oksana ok-SAH-nah
Ukrainian praise to God; Ukrainian form of Xenia - Onora oh-NOR-ah
Irish, Latin honor; Irish variant of Honora
6 Nature-Inspired Girls Middle Names That Start With O
These 6 names draw from the natural world — oceans, plants, and the sky — making them a meaningful choice for families who want a name rooted in something larger than themselves.
- Oakley OHK-lee
Old English meadow of oak trees - Oceana oh-shee-AH-nah
Greek of the ocean or sea - Oleana oh-lee-AH-nah
Scandinavian ancestor’s descendant; associated with the oleander flower - Orion oh-RY-on
Greek rising star; constellation name - Ossia OH-see-ah
Latin relating to the bones of the earth; stony ground - Ovida oh-VEE-dah
Hebrew gentle as a dove; bird-inspired
Frequently Asked Questions
What are the most popular girls middle names that start with O?
Olivia, Odette, and Ophelia consistently rank among the most popular O middle names for girls in the United States right now. They flow well after most first names and are widely recognized without feeling overused in the middle spot.
What short girls middle names start with O?
Ora, Opal, and Olive are among the shortest O middle names for girls, each coming in at one or two syllables. Their brevity makes them especially useful after long first names like Evangeline or Seraphina.
What unique girls middle names start with O?
Ondine, Orla, and Ottilie are distinctive O middle names that rarely appear on current birth certificates, so they stand out without sounding invented. Each has solid historical roots that give the name genuine substance.
Do middle names that start with O work well with any first name?
O names work best after first names that end in a consonant sound, since two vowel sounds running together — like Aria Opal — can blur when spoken quickly. A quick test is to say the full name out loud three times at normal speed to check the flow.
Are there nature-inspired girls middle names that start with O?
Yes — Opal, Olive, and Ocean are among the most recognizable nature-inspired O middle names, referencing a gemstone, a tree, and the sea respectively. They carry a grounded, organic feel that pairs well with both modern and classic first names.
What vintage girls middle names start with O?
Ottilie, Odessa, and Orpha are vintage O names that were most common in the late 19th and early 20th centuries and are rarely given today. Choosing one as a middle name is also a natural way to honor an older relative with a similar-sounding name.