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.

Atticus, with its trendy Roman feel combined with the upstanding, noble image of Atticus Finch in To Kill a Mockingbird, is a real winner among boy names. Atticus entered the US Top 1000 in 2004 and is a firm Nameberry favorite.

Elsie is a sweet vintage nickname-name turned modern star. After a 30-year hiatus, Elsie started climbing the US popularity list 20 years ago and is still headed for the top.

Strong, charismatic, and sleek, Elias has followed in the footsteps of Elijah and Eli to become a popular choice among parents today.

The name of the Roman goddess of the moon, Luna is derived straight from the Latin word for moon, luna. Luna may be the name most likely to surprise someone from an older generation by its Top 10 status in the US and its widespread international popularity.

Penelope is an unlikely 21st century baby name success story. Off the Top 1000 for 25 years, Penelope jumped back on in 2001 and has been heading uphill ever since, propelled by the trend for mythological names, Spanish actress Penelope Cruz, and some high-profile celebrity babies.

Astrid has been a Scandinavian royal name since the tenth century, and many people associated it with the Swedish author of the Pippi Longstocking stories, Astrid Lindgren. Astrid is derived from the name Ástríðr, which is made up of the Old Norse elements that mean "god" and "beautiful."

Bodhi is a Sanskrit name translated as "enlightenment" or "awakening" which relates to a Buddhist concept, wherein Bodhi is synonymous with the state of nirvana, being freed from hate, greed and ego. The Bodhi tree is a large fig tree under which the founder of Buddhism received enlightenment. Spelling variations include Bodie and Bode.

You might think of Harper as the hottest name of the last decade, jumping from obscurity to the Top 10, where it remained until last year.

Avery is a hugely popular name in the US, especially for girls. But while nearly four times as many girls as boys are named Avery today Avery's popularity is starting to soften for girls while it continues to strengthen for boys.

Birdie was until recently a middle-aged Ladies' Club member wearing a bird-decorated hat --but now it's just the kind of vintage nickname (think Hattie, Josie, Mamie, Millie) that's coming back into style in a big way. Actress Busy Philipps named her baby Birdie (inspired by First Lady Lady Bird Johnson), as did soap star Maura West.

Eric is derived from the Old Norse name Eiríkr, from the components ei, meaning "ever," and ríkr, "rule." It was adopted by English speakers in the mid-nineteenth century, who were already familiar with the exploits of the tenth century Viking navigator and discoverer of Greenland, Eric the Red. Erik is an alternate spelling and the preferred form of the name across much of Europe.

One of those simple, straightforward English surnames -- and with a presidential pedigree -- that's easy to translate into a first. Chosen by both Kevin Costner and Jessica Alba for their sons, it has been climbing the US charts since 2009.

Forrest is one of the earliest appealingly sylvan, outdoorsy choices, borne by newsman Sawyer, actor Whitaker, and football Hall of Famer Gregg. Forrest Gates was a character on "Buffy the Vampire Slayer."

Sweet and stylish, with a sporty, energetic undertone, Everly is a name that ticks lots of boxes.

Knox is an old Scottish surname that Brad Pitt (whose great-great-grandfather was named Hal Knox Hillhouse) and Angelina Jolie took out of the back cupboard, dusted off, and elevated to coolness--to the point where it entered the popular baby names list in 2009. Knox now ranks among the most influential celebrity baby names.

Rumi is a Japanese girl name, with a sweet yet substantial sound. Reminiscent of other popular choices in the West — think Ruby, Remy, and Romy — it is currently achieving more notice thanks to Beyonce and Jay-Z, who chose it for one of their daughters.

A name that crosses cultures, Idris was virtually unknown in the US before the emergence of the charismatic actor Idris Elba, first on The Wire and then for depicting Nelson Mandela. Since then, the name has grown with the actor and is a popular choice in the UK and Belgium, and a familiar one in The Netherlands, France, and the US.

Orla is an Irish name closely associated with the high king Brian Boru, as it was the name of his sister, daughter and niece. It was very popular in the Middle Ages – the fourth most popular name in twelfth century Ireland – and has become popular again in Ireland, Scotland, England and Wales today. In Irish, the name is commonly spelled Orlaith or Orlagh.

Stevie survives as a short form of Stephanie thanks to the immortal Ms. Nicks. After a little more than a decade out of the limelight, she rejoined the US Top 1000 in 2014. It is now leading the trend of boyish nicknames for girls - standing alongside picks like Charlie and Scottie.