Girls Names Beginning With O

Onyx is a fresh and trending gemstone name for boys, currently in the US Top 500, having climbed the charts rapidly since 2018. Now, an increasing number of girls are receiving the name, with a recent count revealing nearly 200 baby girls were called Onyx in 2023.

Form of Ottilie or Odilia

Though it has never charted in the United States, this frilly name has the elements some brave, modern namers might find attractive—namely, the initial O and the -ia suffix.

Short and slight, with great potential now that names like Ava, Ida and Orla are popular. Ora Beach is a tourist destination on Seram Island, Indonesia.

The memorable folk singer, an early single-name celeb, brought this into the spotlight. The French variation is Odette.

If you're a lover of the beach and sea, and want a name that relates to the largest body of water, there are several variations you could consider.

A particularly beautiful member of the Orane/Oriana clan, Oriane is the first name of a major character in Proust's In Search Of Lost Time, the Duchesse de Guermantes.

Orchid is a hothouse bloom that has not been plucked by many modern baby namers — yet. In the language of flowers, orchids symbolize love, beauty, and sophistication.

This name, more often spelled Ottoline, is curiously appealing, in a hoop-skirted, wasp-waisted way; heard more often in novels than real life, though that is showing some signs of change.

What is so rare as a month named June? October – and November and December – are a lot rarer. Brisk and substantial, they're so much more memorable and modern than April or May. October got its name via being the eighth month in the old Roman calendar. Some related, more feminine variations are Octavia and Ottavia.

In early, pre-Norman Ireland, this name was borne by both a sister and a niece of high king Brian Boru. Now, the English form Orla is more commonly used.

In Germanic mythology, Ostara is the goddess of springtime, fertility, and dawn. Her existence as a mythological figure was pieced together by scholar Jacob Grimm, who used evidence such as the German word for April (ostermonat) and parallels to the Anglo-Saxon Eostre. Ostara is also the modern German name for the Easter holiday.

A feminine form of Oliver and a diminutive of Olive, Olivette could make an interesting choice for those who love Colette and Violette, but also Olivia. It was used in the 19th century French opera Les noces d'Olivette and ranked in the Top 500 in France in the early half of the 20th century.

Though this name properly takes an accent over the first e, most Americans would probably have trouble pronouncing it with French elan.

Mount Olivet is a mountain ridge east of and adjacent to Jerusalem's Old City. It is named for the olive groves that once covered its slopes. Several key events in the life of Jesus, as related in the Gospels, took place on the Mount of Olives, and in the Acts of the Apostles it is described as the place from which Jesus ascended to heaven. This name makes a fresh alternative to Olivia and is worthy of consideration.

Omaira is an intriguing Middle Eastern possibility.

A romantic Latinate form of Ondine, Ondina is an undiscovered gem that shares similar sounds with the trendy Olivia and Ophelia.

Oakley is one of the truest unisex names for babies, achieving a 56-44 gender distribution, favoring girls. Oaklee is 80% female and may serve as a clearer identification of sex, if that’s what you’re interested in.

A pleasantly unfamiliar addition to the ella family of names.

French variation of Ophelia that might make that lovely-and-haunted name feel more viable, yet there will be inevitable pronunciation issues.