Callum is a gentle, charming name of Scottish origin, that is a popular choice across the UK. In the US, it was a rare option until the late 2000s, however, since 2017 it's been rising up the ranks. Complete with easy, breezy and cool nickname Cal, it climbed more than 60 places in the US in 2024, placing it just outside the Top 150.

Milo is most commonly considered to be Germanic name derived from the Latin word miles, meaning "soldier." However, there is evidence to suggest it also may have independently spawned from the Slavic root milu, meaning "merciful." Milo predates brother name Miles, a variation that evolved when the name immigrated to the British Isles in the Middle Ages. Mylo is an alternate spelling.

Llewellyn/Llywelyn is a common patriotic first name in Wales, with its distinctive Welsh double LL's; in the U.S. Llewellyn would make a daring choice, though with the chance that some might find the ellen sound slightly feminine.

Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers.

Atlas is one of those names that was previously thought too powerful for a baby boy, who would have to be strong enough to carry the world on his shoulders. Now Atlas has joined the pantheon of Greek and Roman god and goddess names in the realm of possibility, along with Mars, Zeus and Apollo.

Beau suggests someone devilishly handsome, with a large measure of southern charm—a nice image to bestow on your boy. Often solely a nickname in the past, it's now standing firmly on its own. Beau has been on the Social Security list non-stop since 1969.

Gentle but grandiose and beloved by British novelists including Evelyn Waugh and P. G. Wodehouse, Ambrose was a fast rising name in 2022. Entering the UK Top 1000 for the first time and proving popular among Nameberry users, its elegance, softness, and vintage style means it fits in with popular Theodore, Sebastian, and Jeremiah.

Magnus is a Latin name, literally meaning "greatest," that has a Scandinavian feel. It dates back to Charlemagne being called Carolus Magnus, or Charles the Great. Norwegian king Magnus I, named after Charlemagne, introduced it to his culture, and thus Magnus was the name of six early kings of Norway and four of Sweden. It is still a highly popular name in Denmark and Norway.

Cassius, a Shakespearean name rooted in antiquity, is trending in a major way. It's one of a raft of Cas-starting names for both boys and girls, including Caspian, Cassian, and Cassia, that are enjoying a new moiment in the sun.

River shares the tranquil feeling of all the water names, and seems to have pretty much escaped its past strong association with River Phoenix and his unfortunate fate. Actor Joaquin Phoenix named his son with actress Rooney Mara after his brother River.

Magical and powerful, but gentle and approachable too, Emrys is a Welsh name which may be worth considering if you're looking for something less common that Dylan, Evan, or Morgan. An offbeat epithet of the wise wizard Merlin, it's currently in the Welsh top 100 and in the England and Wales Top 500 over all.

Orion is a rising star, with both mythical and celestial overtones.

Evander is a name that could build on the popularity of shorter form Evan, and could work and play well with schoolmates like Zander and Xander.

Calloway is one of those irresistibly jaunty, animated three-syllable surnames, like Sullivan, Rafferty and Finnegan — but this one has the added attraction of jazzy ties to the immortal "Dean of American Jive," Cab Calloway. With its melodic sound, its similarity to Callahan, Caleb, Waylon, and Callum, and its fun, nature meaning, Calloway is a quietly rising choice in the US, given to 87 boys (and 22 girls) in a recent year.

Shepherd is an occupational surname with a pleasant, pastoral feel, an outdoorsy vibe, a gentle sound and a cool, contemporary energy. The name has been rising steadily in the US since the mid-2000s, but it didn't break in to the Top 1000 until 2016. Since then, it has become a fresh but familiar choice, ranking in the Top 350 in a recent year.

Lucian is a sleeker, more sophisticated version of Lucius that is climbing in tandem with other Lu-starting names.

As modern as it sounds, Blaise is an ancient Christian martyr name. In Arthurian legend, Blaise is the name of Merlin the Magician's secretary. Its relation to the word and name Blaze gives it a fiery feel. Amanda Beard named her baby boy Blaise Ray.

A short but strong biblical name with multicultural appeal, Asa is enjoying new visibility thanks to hot young actor Asa Butterfield of Hugo fame.

Sullivan is a jaunty Celtic three-syllable name, with a real twinkle in its eye. It was immortalized in the 1930s classic film Sullivan's Travels and was chosen for one of Patrick Dempsey's twin boys. Nickname Sully is equally jaunty.

Fletcher is a common surname with a touch of quirkiness; it definitely fits into the So Far Out It's In category--and moving further in all the time along with other occupational names from Parker to Forester.