Begins or Ends with O

With a touch of celestial power, a hint of clunky charm, and the totally cool -o ending, Cosmo may well be finally shaking itself free of both the Seinfeld association (which made it a punchline of a joke) and the cartoon fairy association from The Fairly OddParents. In fact, it is in the Top 1000 in the UK and a favorite on Nameberry.

The fashion for using surnames as firsts has extended beyond the familiar Morgan and Parker to choices such as Cohen and O'Brien to -- why not? -- this quintessentially Irish name with the friendly o ending.

Variation of the popular religious name, boosted by megastar Portuguese footballer Cristiano Ronaldo.

If you're a movie fan or a sports fan, you might be attracted to this name, via the film "Donnie Darko" or the Serbian-born basketball star Darko Milicic. It is kind of dark, though.

Demetrio is an original way to a mythological name, and is further appealing as a boy's name inspired by a goddess, the earth mother Demeter.

Swashbuckling name worthy of a hero in a romance novel. Deveraux or Devereaux is drawn from the town of Evreux in France and combined with the prefix de- denoting it likely referred to a noble of that area.

Possibly meaning "bold", this West African surname is less commonly found as a first name, too.

The energetic Diego is rising rapidly along with a lot of other authentically Spanish baby names that work perfectly well with surnames of any origin.

Italian heritage name. It's sweet and simple, but has fallen almost out of use since its heyday in the 1960s.

For as long as we all shall live, Harry Potter's sneering nemesis.

A stalwart of Latin nomenclature that could work just as well for Anglos. Proof lies with the celebrity birth announcement — Hilaria and Alec Baldwin named their fifth child Eduardo Pau Lucas in 2020. This doesn't seem to have much impact on other parents, though: over 900 boys received the name in 2021, but the number is steadily decreasing.

Dashing and suave, with a hint of poetry and gentleness, Emilio is an appealing and international choice. A solid favorite in Italy, it is also on the rise in the US, France, Austria, and the UK.

Fiery sound and uplifting meaning, but it's also among the Top 100 dog names. Spelled Fiyero, it's the hero of the book and musical "Wicked."