If you have already found the perfect first name for your baby, it’s time to select the ideal middle name to go with it. Here’s a great list of middle names that start with the letter O.

Middle Names That Start With O

  • Onyx A primarily gender-neutral name, Onyx means “black gemstone”. It has English origins. The name pairs well with two and three-syllable names like Zion, Caspian, or Zayne.
  • OakleyIt was once a boy’s name, now it’s become gender-neutral. Oakley has a British origin and means “meadow of oak trees”. The name doesn’t have a significant meaning, but it pairs best with names like Riley, Annie, Declan, Charlotte, or Lincoln.
  • Olsen Olsen has a Scandinavian origin that means “son of Olaf”. It pairs well with mainly gender-neutral names like Rowan, Hudson, Finn, Sawyer, or Beckett.
  • Oz Oz is the diminutive form of names that begin with Os like Oswald. It has Hebrew origins and means “strength, courage”. Parents that imagine their son as someone who demonstrates strength or bravery might select this name.
  • OllieOllie is commonly the shortened form or nickname for Oliver or Olivia. It’s primarily unisex and means “olive tree”. First names that pair best with this middle name include Benjamin, Mia, Eli, Alexandra, Alexander, or Bella.
  • Omega Omega is a gender-neutral name, but commonly chosen for girls. It has Greek origin and means “the end”. It’s also the final letter of the Greek alphabet. Parents might select this name if they feel it will be their last child. It signifies the last child.
  • Ondrea Ondrea has Czechoslovakian origin and means “strong, courageous”. Parents that envision their baby girl growing up with these attributes will love the name.
  • Okena Primarily gender-neutral, Okena has a Native American Blackfoot origin. It means “water chief”. It goes well with names like Sunhil, Roan, Anika, Nayeli, or Jesiah.
  • Odell Primarily unisex, Odell has an Old English origin and means “from the woad hill”. The name doesn’t have a special meaning like some of the other names on the list. However, it will pair well with any syllable first name.
  • Ojai Primarily unisex, Ojai has a Native American Chumash origin. It means “moon”. Parents might want to select the name if they have Native American descent or for the meaning. Many often see the moon as beautiful and parents that feel their child is beautiful might want the name.
  • Oke From Hawaiian origins, Oke means “deer lover”. The name is primarily gender-neutral. While it’s considered gender-neutral, it’s a form of Oscar. The name pairs well with names like Wilder, Rhett, Iria, Rue, Estee, Rei, and Enoch.
  • Och Primarily unisex, Och has Mongolian origin and means “sparkle, the sparkle of loved ones”. Parents that see their child as their joy or wish to reflect radiance on their child will love this name.
  • Oyewole Oyewole has African Yoruba origins. It means “born of good standing”. Parents that wish to set a standard for how their son at birth might select this name.
  • Odalis From French, Spanish, and Germanic origins, Odalis has a few meanings. One meaning is the French, “concubine, chambermaid”. However, it also means “wealth”. It’s a unisex name that is commonly given to girls over boys. Parents may opt for the second name’s meaning and wish to reflect good fortune on their child might choose the name.
  • Orville From Old French origins, Orville means “gold town”. The name pairs well with first names that have one or two syllables.
  • Osvaldo Osvaldo is the Spanish version of Oswald. It means “God’s rule, God’s power”. Devout parents that see God’s power by blessing them with a child will adore the name.
  • Orra From Latin origin, Orra means “pray”. It’s the alternate spelling of Ora. Religious families will adore the name if they prayed for a baby girl.
  • Orland From Spanish and Old German origins, Orland means “land of gold”. It’s a variant of Orlando. The name pairs well with first names that have one, two, and three syllables.
  • Octavio From Latin origin, Octavio means “eighth”. It sounds best with names like Jasper, Apollo, Ivan, Macario, or Atticus.
  • Oracle Primarily gender-neutral, Oracle has Greek origin and means “prophecy”. Parents might select this middle name if they felt a baby was always in their future.
  • Onella From Hungarian origin, Onella means “torch light”. Parents that visualize their daughter as a guiding light for others might select Onella as a middle name.
  • Oneida From Native American origin, Oneida means “eagerly awaited”. Parents that couldn’t wait for their baby girl to be born or took time to conceive will love this as a middle name.
  • Oshae Primarily unisex, Oshae means “hawk”. It has American and Irish origins. It’s a variant spelling of the Irish surname “O’Shay. The name will work with any syllable first name.
  • Orly Primarily unisex, Orly has a Hebrew origin and means “you are my light”. With a meaning like that, any parent is sure to love Orly for a middle name.
  • Ortega From Spanish origin, Ortega means “dweller at the sign of the grouse”. The name doesn’t have one of significance. However, it does pair well with names like Alejandro, Diego, Angel, Jose, or Mateo.

Boy Middle Names That Start With O

  • OtisFrom Old German and English origins, Otis means “wealth, son of Otto”. Wives that have a husband named Otto or parents who want to instill a wealthy life in their son might choose Otis.
  • OscarWith Irish and Gaelic origins, Oscar means “spear of the Gods”. In Irish mythology, Oscar was a fierce fighter that was loved by his community. Parents that picture their son as a leader or share characteristics with warriors might opt for Oscar.
  • Otto From German origin, Otto means “wealth”. Otto pairs well with first names like Arlo, Leo, Theodore, Felix, and Henry.
  • OwenFrom Irish and Welsh origins, Owen means “the Yew tree, youth”. It’s a variant of Owain and Eoghan. Parents that see their child as youthful might like Owen as a middle name.
  • OrlandoFrom Italian origin, Orlando means “from glorious land”. It’s also a city in Florida. It pairs well with first names that have one, two, and three-syllables.
  • Orin With Aramaic, Irish, Gaelic, and Hebrew origins, Orin means “light, pale, pine tree, fair”. This middle name pairs best with first names like Thames, Adrian, Romeo, Sasha, or Alexander.
  • Olalla From Spanish origin, Olalla means “well-spoken”. Parents that envision their son as articulate or elegant will love this name.
  • OmarionOmarion is a variant of Omar. It has an Arabic origin. The name has various meanings like “flourishing, bitter, eloquent speaker”. The name was made famous by a Rap/Hip Hop artist of the same name in the early 2000s. Omarion pairs well with any syllable first name.
  • OliverFrom Norse, Latin, and French origins, Oliver means “ancestor’s descendants, olive, olive tree”. Oliver pairs best with first names like Edmond, Frederick, Avery, Arthur, and Sage.
  • Olaf From Scandinavian origin, Olaf means “ancestor’s heir”. Parents might select Olaf to represent how their child is the heir to the family.
  • OdinFrom Scandinavian origin, Odin means “frenzy, rage, inspiration”. In Nose mythology, Odin is the highest of all the Gods. He presided over art, war, death, and wisdom. Parents might get turned off by the meaning of the name but love the history behind it.
  • Ole Ole is a variant of Olaf. It has Scandinavian origins and shares the same meaning “ancestor’s heir”. Ole pairs well with first names like Andre, Nate, Alistair, Ande, or Duarte.
  • OmarFrom Hebrew origin, Omar means “long life, popular, flourishing”. Parents that wish to reflect these on their child and their life might select this middle name.
  • OrionFrom Greek origin, Orion means “mountain dweller”. The name doesn’t have significance, but it does have an interesting history. Orion was a hunter and son of Poseidon. Zeus turned Orion into a constellation and when you look to the sky it’s the most recognizable. Parents that see their son as a shining star might consider this name.
  • OrsonFrom Latin origin, Orson means “bear, bear cub”. Mothers will find this middle name endearing because they see their babies as their cubs they need to protect.
  • Osman From Scandinavian origin, Osman means “God’s protection”. Religious parents will love the name because it references how God protects and watches over their little ones.
  • OzzyWith German and Old English origins, Ozzy means “spear of the gods, God’s power”. It’s also the short form of Oswald or Osbourne. Spiritual families will favor the name for its meaning. It represents how God’s power was shown through because of the birth of their son.
  • Owain From Welsh origin, Owain means “youth”. The name pairs well with names like Gideon, Soren, Torsten, Liam, or Johnathon.
  • Osian From Irish and Welsh origins, Osian means “little deer”. Osian is the Welsh version of the Celtic name Oisin. As a middle name, it pairs well with one, two, and three-syllable first names.
  • Ozan From Turkish origin, Ozan means “poet, storyteller, bard”. Parents that imagine their child as creative might select the name.
  • Obama From African Luo of Kenyan origin, Obama means “crooked, slightly bent”. The name’s meaning isn’t the most flattering, but it does pair well with names like Reth, Taariq, or Hamish. It’s also the name of a former President.
  • OctaviusWith Latin origin, Octavius is a variant of Octavio and shares the same meaning “eighth”. Octavius pairs well with first names that have one or two syllables.
  • Oleg From Slavic origin, Oleg means “holy light”. Religious families will adore the name because it represents how God blessed their son.
  • Oleander From Greek origin, Oleander means “evergreen tree”. Oleander works well with first names like Jason, Jacob, Bryce, or Cain.
  • Odysseus From Greek origin, Odysseus means “anger, hate”. Odysseus was a hero who fought in the Trojan War. Parents might want to avoid the name because of the meaning but they might change their mind about the history. Parents that want a name of strength, bravery, or loyalty might choose Odysseus.
  • Oba With African Nigeria origin, Oba means “King”. Parents that feel their son is their little king might select the name. It also pairs well with any syllable first name.

Girl Middle Names That Start With O

  • Oceana From Greek origins, Oceana means “from the sea”. Oceana is the feminine form of Oceanus. Oceanus was a titan in Greek mythology. The name sounds best with names like Faith, Lynn, Josie, Lily, Elena, or Priscilla.
  • OpalFrom Hindi or Sanskrit origin, Opal means “precious gemstone”. Parents that don’t want a popular gemstone name like Jade or Ruby might prefer this middle name over another.
  • OdessaFrom Greek origin, Odessa means “long journey”. It stems from the word Odyssey. Parents might select this name if they struggled a long time to conceive. It represents how long it finally took to get their precious baby girl.
  • Oaklynn With American origin, Oaklynn means “beautiful oak”. It stems from Oakley but combines “Lynn”. Oaklynn sounds best with names like Rose, Paige, May, Elsa, or Nova.
  • OdetteWith French and Old German origins, Odette means “wealth”. Odette was the name of the good swan in the ballet, Swan Lake”. Parents that wish to instill a prosperous life in their daughter might choose it. Alternatively, parents might feel wealthy because of the birth of their daughter.
  • OliviaFrom Latin origin, Olivia means “olive tree, olive”. It’s the feminine form of Oliver and ranks in the top five for baby names. Olivia sounds best with first names like Paige, Brynn, Adrienne, Noelle, or Grace.
  • Omarosa From African Nigerian origin, Omarosa means “my beautiful child”. Parents will love the meaning behind Omarosa.
  • Onika From African Igbo/West African origin, Onika means “Who is greater than God?”. Spiritual parents will love this name because it represents that the birth of their daughter can only be because of how powerful God is.
  • OpheliaFrom Greek origin, Ophelia means “helper”. Ophelia was the female love interest in Shakespeare’s play Hamlet. Ophelia is a classic name that sounds best with first names with one or two syllables.
  • Oprah From Hebrew origin, Oprah means “fawn, gazelle, young deer, place of dust”. Oprah is derived from Orpah. The name was made famous by Oprah Winfrey. It pairs well with first names with one, two, and three-syllables.
  • Orchid From English origin, Orchid means “flowering plant”. Orchid was said to be used to make love potions because it was under the influence of the Goddess Venus. The name sounds best with first names like Ava, Molly, Lorelei, or Eve.
  • OliveFrom English origin, Olive means “olive, from the olive tree”. It’s a shortened form of Olivia. Olive pairs well with any syllable first name.
  • Oleisa From French origin, Oleisa means “God’s promise”. It’s a variant for the name Elizabeth. Religious parents will love the meaning. It stands for God promising them with a baby girl.
  • Ondine With French and Latin origins, Ondine means “little wave”. In mythology, Undine was the spirit of the waters. Ondine sounds best with first names like Kai, Pearl, Ella, Emma, Fiona, or Gabriella.
  • OctaviaFrom Latin origin, Octavia means “eighth”. It’s the feminine form of Octavio or Octavius. It pairs best with first names with one or two syllables.
  • Odelia From Hebrew origin, Odelia means “I will thank God”. Devout parents will especially love the name’s meaning because they can share their gratitude for God’s blessing through the name.
  • Oksana From Slavic origin, Oksana means “praise be to God”. Religious families can honor God through the name.
  • Olena From Russian origin, Olena means “sun ray or shining light”. Parents that see their baby girl as their sunshine or radiant might select this middle name.
  • OlympiaFrom Greek origin, Olympia means “mountain of the Gods”. Olympia sounds best with first names with one-syllable.
  • Ozell From Hebrew origin, Ozell means “divine strength”. Devout families will adore the name’s meaning. It represents the characteristics of God that your daughter will inherit.
  • Olga From Slavic origin, Olga means “holy”. It’s the feminine form of Oleg. Religious parents that wish their daughter will dedicate her life to God or are scared of them might select this middle name.
  • Oliana With Spanish origin, Oliana means “my God has answered”. Spiritual parents that seek a name to represent how they feel about their daughter might opt for the name.
  • Odeda With Hebrew origin, Odeda means “to encourage”. Odeda sounds best with first names like Anais, Bridget, Maude, Frida, or Eunice.
  • OrianaWith Latin origin, Oriana means “sunrise, golden”. Oriana pairs well first names that have one or two syllables.
  • Orlaith From Irish origin, Orlaith means “golden queen”. Parents that envision their daughter with queen-like traits will adore this name.