Quirky cool Arlo is now well and truly back. Last year it broke into the US Top 200 boy names and consistently ranks among the most popular boy names on Nameberry. Along with its Irish and English roots, Arlo may be a shortened form of the Italian Carlo or the Spanish Carlos, both forms of Charles,and in Basque-speaking regions it is the word for area.

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.

Long popular in Ireland and England, Kieran, the name of Ireland's first-born saint and twenty-five other saints, has been building its U.S. fan base thanks to its strong and attractive sound, and its fashionable Irish brogue. While Ciaran is the more authentic Irish spelling, Kieran is more popular this side of the Atlantic.

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

Rugged, outdoorsy, and full of energy, Wilder entered the US Top 1000 back in 2015. Part bad boy, part Western, part preppy, and part nature-loving, Wilder is given to nearly 800 babies each year.

A variation of Jenson, which is actually more popular than the original in the United States. This spelling also holds the distinction of being the most common surname in Denmark.

Kellen is German in origin and Irish in spirit. Kellen has fallen a bit in popularity for boys since its peak in 2012, but it has possibilities for girls too. In fact, Kellen's similarity to such feminine names as Helen, Ellen, and Kelly makes it feel more unisex or even female, though Twilight actor Kellan Lutz has done much to popularize this name for boys.

Both offbeat and upbeat, this evocative traditional Irish name that runs through Celtic mythology is known here via award-winning novelist Cormac McCarthy (born Charles). The author's adopted name is related to Cormac Mac Airt, one of the great legendary high kings of Ireland.

West is the most fashionable of what you might call the direction names, with North and East (or Easton and Easter) coming up behind, and South not yet on the map.

Few people would have considered the surname of this famous Victorian poet as a first name until Russell Crowe chose it for his son in 2006. But, as a rhythmic three-syllable patronymic, Tennyson has a lot going for it, not least of all the appealing nickname Tenny.

With a cool color meaning and a woodsy, earthy feel, this anglicized spelling of the Irish name Odhrán could rise in popularity thanks to Olympic rugby player, Orrin Bizer. The name did rank in the US Top 1000 in the late 1800s and the early 20th century, but has been out of the charts since the 60s.

This variation adds a second n to the more popular Finley, presumably to provide a more direct link to nickname Finn. Both spellings create a distinctly unisex name. The Finnley version, however, entered the US Top 1000 for boys in 2014, and it remains unranked for girls.

This name has recently come on the radar via rising actor Dev Patel, who made his mark in Slumdog Millionaire and then in Lion and is also the name of the lead character played by Aziz Ansari in his sitcom Master of None. It could catch on here, at a time when parents are importing other three-letter names like Liv.