Cat Names That Start With O

With its relation to Mount Olympus, home of the Greek gods, and to the Olympic games, this name has an athletic, goddess-like aura, making it the perfect Olivia substitute.

Name of the legendary ancient Greek poet and musician — whose music was so beautiful it made trees dance and rivers stop to listen — would provide a child with a challenging but indelible identity.

Nature names like Ocean and River are flowing back into favor, especially with nature lovers and green-oriented parents.

The name of the brave, resourceful hero of Homer's epic saga has almost always been considered too weighty for a child to bear, but at this point, some brave, resourceful parents out there might be willing to take it on.

Oakley, with its nature name roots and its Annie Oakley charm, is a hot name for both genders but more than twice as popular for girls. This name made it into the Top 1000 for the first time in 2013, one of only four girl names starting with O to rank that high. A decade letter, it's aiming for the Top 100.

This old-timey nickname for Otis and Odell is strongly tied to Garfield’s canine companion in the Garfield comic, movie, and TV franchise.

Octavius, which was at one time used for the eighth child in a family, has the worn leather patina of all the ancient Roman names now up for reconsideration. As a Roman family name, it derives from the uncommon forename Octavus, which designated an eighth son.

This may be a legitimate Hebrew name denoting power, but to any American kid, it will evoke ruby slippers and a yellow brick road. The full Hebrew name is Ozni, who was a grandson of Jacob in the Bible.

Down-home nickname name once associated with the friendly dragon on kids' TV. As Oliver rises, we may well hear more Ollies.

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.

Curiously appealing, in a hoop-skirted, wasp-waisted way, Ottoline has recently entered the realm of modern possibility, especially since Sienna Miller chose it as the middle name of her daughter Marlowe.

Ocean is a nature name that comes right out and states its meaning and association. Full of power and depth, Ocean is one of the fastest-rising baby names for both girls and boys, making the US Top 1000 for both genders in 2021. Oceane, the version that's trendy in France, was used for only 11 baby girls in the US in the same year. Ocean-lovers who want to be less obvious can choose such subtler names that mean ocean as Jennifer or Marissa, but coming right out and using Ocean is a perfectly valid way to go.

With the rise of ancient Roman names, Octavian suddenly seem plausible again. A variation of Octavius and relative of the more modern Octavio, it's an equally attractive member of the trio.

Odette's evil Swan Lake twin -- gives the name a sinuous, sensuous appeal.

Ollie is used less often as a nickname for the mega-popular Olivia or the stylish Olive than Ellie is for Eleanor or Allie for Allison. That may be because Ollie has a much longer use as a nickname for boys.

Like many a popular name, Ornella is a theatrical creation. Italian playwright Gabriele d'Annunzio created this name for his dramatic heroine in the 1904 play La Figlia di Iorio. Ornella is a feminization of the orno or ornello, which is the Italian word for the Fraxinus Ornus, a type of tree which produces such sweet sap that it was compared to biblical manna.

This rarely used boys name is one of the few gem names for a boy. Obsidian is actually a type of volcanic glass, formed when lava cools very quickly. This ultra-cool name might spark a love of volcanoes and geology in a little boy.

Only if you're an aviation buff or seriously addicted to popcorn.

Olwen is a Welsh favorite, the name of a legendary princess in what is believed to have been the earliest Arthurian romance, and in fact one of the first recorded examples of Welsh prose.