Fairly popular a hundred years ago but out of the US charts since 1978, the quirky yet edgy Roscoe feels very much in step with the trending o-ending boy names popular now, such as Milo, Hugo, and Otto. A Top 1000 choice in the UK (albeit near the latter end), it could make a cool alternative to Ross, Russell, Robert, and Ronan.

With its sharp, succinct sounds and cool, laidback style, Eli is a popular choice among parents today. Compact and punchy, it is a Biblical name with plenty of charm.

Cillian is one of the native Irish names that, along with Aiden and Declan, is becoming an unlikely favorite in contemporary America. The Killian spelling has been more popular in the US, but Cillian's star is rising, perhaps thanks to Irish actor Cillian Murphy, star of Oppenheimer and Peaky Blinders.

Quinn is an engaging Celtic surname, zippy, concise and strong. While it may now lean feminine in the US, given to girls about 80% of the time, it is still given to a substantial number of boys: 615 in a recent count.

Levi, lighter and more energetic than most biblical names, with its up vowel ending, combines Old Testament gravitas with the casual flair associated with Levi Strauss jeans.

Beckett is one of the big baby name hits of the decade.

Long lingering in limbo, Warren suddenly seems to be on the cusp of revival. One of the oldest recorded English surnames, Warren's popularity in the U.S. dates back to the nineteenth century, and by 1921, reached its peak at Number 24.

With mythological names rising, the handsome son of Zeus and god of medicine, music, and poetry among many other things might offer an interesting, and melodic option. Similar in style to Atlas and Atticus and similar in sound to Arlo, Paolo, Paul, and Ollie, Apollo entered the US Top 1000 back in 2012, and was propelled upwards after it was chosen by Gwen Stefani and Gavin Rossdale in 2014.

Tucker has more spunk than most last-name-first-names, and also a positive, comforting ("Tuck me in, Mommy") feel.

A cool Biblical option that entered the US Top 1000 for the first time ever in 2024, Ozias gets extra points for its user-friendly nicknames Oz and Ozzie or Ozzy. Given to around 280 boys in 2024, it is five times more popular than it was in 2014.

Cleo, one of the few girls' names to boast the cool-yet-lively o ending, is of course short for Cleopatra, the name of one of the most powerful women in history.

Succinct, stylish, and catchy, Ivo has the energetic impact of other names ending in -o. It is a multicultural choice with two distinct origins, and, as such, is familiar across a variety of countries, ranging from the Netherlands to Brazil, from Portugal to Czechia.

Simone, the elegant French feminization of Simon, strikes that all-important balance between unusual and familiar, and it's oozing with Gallic sophistication. A dated choice in its native France, gymnast Simone Biles brings new bounce and spark to name.

With its rugged, country charm and confident sounds, Waylon is among the wave of Old Western names that parents are choosing.

Fairy-tale memories of Sleeping Beauty inspire some parents—such as Rachel Bilson and Hayden Christensen—to call their daughters Briar Rose. But Briar plus a different middle name might work even better. It's one of the newly popular nature-word names, charting in the US for the first time in 2015 for both genders.

An Old Testament name with a Gaelic lilt, Malachi entered the list in 1987.

Raphael is a romantic archangel name that sounds both artistic and powerful. Raphael is also a great cross-cultural choice, with significance for people with both Latinate and Jewish roots, plus plenty of grounding in the English-speaking world.

Before the young Irish actress Saoirse Ronan made her mark in the films Ladybird and The Lovely Bones, few of us had heard this name, let alone known how to pronounce it. But now it is slowly way edging its way into the mainstream, particularly, of course, with parents who have Irish roots. It made its first appearance in the US Top 1000 in 2016, when it was the third-fastest-rising girls' name.

Delaney has been a popular surname-style choice since 90s, when it joined other Irish surnames such as Cassidy, Kennedy, and Mallory on the US Charts. Buoyant, bright, and cheerful, it ranks in the US Top 250 and is given to nearly 1300 babies every year.

Piper is a bright, musical name that entered the list in 1999, one year after the debut of the TV series Charmed, which featured a Piper, and it's been a consistent riser since. Piper Kerman is the memoirist whose prison experiences provided the basis for the hit Netflix series Orange is the New Black.