Sleek and smart, with a hint of mystique about it, Silas is a recent addition to the US Top 100. Both mythological and Biblical in origin, Silas joins the ranks of Isaiah, Atlas, Elias, and Sebastian: polished and contemporary feeling names with plenty of history.

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.

One of the coolest of names, thanks to legendary jazz pianist Thelonious Sphere Monk, who inherited this Latin-sounding German name from his father. It has been used very sparingly since the 1960's, with just a sprinkling of baby boys receiving the name each year, though it's one of the unique baby names we predict will get much less unique as more parents embrace its quirky charms.

This gentle Scandinavian name, soft and sensitive, is being discovered in a major way by parents in the US. It's most closely identified with the nineteenth century philosopher Soren Kierkegaard, but there have been modern fictional Sorens as well, in The Matrix Reloaded and the book series Guardians of Ga'Hoole, Charlie and Lola, and Underworld.

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.

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.

Lavinia is a charmingly prim and proper Victorian-sounding name which actually dates back to classical mythology, where it was the name of the wife of the Trojan hero Aeneas, who was considered the mother of the Roman people.

Casimir, a traditional name of Polish kings, could do quite well these days as we see the rise of Caspian, Cassius, Castiel, et. al. Like Leopold and Laszlo, Casimir is strong and worth considering if you've got an adventurous streak — and bet your son will too.

Alaric is an ancient regal name that sounds modern enough to be considered. Alaric was a traditional name for the kings of the Ostrogoths, the most famous of whom was Alaric I, the King of the West Goths who sacked Rome in 410.

The name of an important ancient Roman emperor, Tiberius might sound a bit heavy for a modern boy to carry, but with the rise of Atticus, Tiberius and brothers begin to feel more baby-friendly, much in the same way as Old Testament names like Elijah and Isaiah have been rejuvenated.

Meredith is a soft, gentle-sounding name with subtle Welsh roots. Although originally a boys’ name , Meredith is used mainly for girls now.

Osiris is the name of Egyptian mythology god-king who died and was reborn every year. Emerging from centuries of obscurity, Osiris has several ingredients for success in the modern world: Roots in ancient myth, an uplifting meaning, an s ending and the cute nickname Os or Oz.

Garrett, also spelled with one 't', is an Irish-inflected name that was in the Top 100 in the nineties, but has now slipped in popularity.

Spelled with either one 'l' or two, Calista came to the fore in 1997 when Calista Flockhart hit it big as Ally McBeal. Flockhart, who bears her mother's middle name, didn't just introduce a name, she introduced a whole sensibility. Pretty and delicate, Calista is definitely worthy of consideration, especially for parents with Greek roots.

Like Horace, Horatio is a variation on the Latin Horatius, but its Shakespearean and optimistic Horatio Alger pedigree makes it an attractive up-and-comer, especially with its cool final o. A modern reference is the charismatic TV character Horatio Caine played by David Caruso in CSI: Miami.

Icarus, the mythological figure famous for flying too close to the sun, has a couple of negatives: his rash reputation, and those "icky" nicknames.

A punchy modern Cornish name derived from a place name, which is of disputed origin. It is sometimes said to derive from a rare Welsh name, Maeldaf, plus dinas, the Cornish for "fort". Another theory is that it comes from Cornish ty "house" plus malsai "eel" – likely a reference to Cornwall's fishing trade.

Salem is a biblical place-name in Canaan, believed to be the same as Jerusalem. Americans may be more familiar with Salem as the name of the Massachusetts town famous for its witch trials in the late 1600s. It's also a popular Arabic name widely-used for both genders.

Cyra is an unusual name that can be pronounced either SEER-a or SI-ra, rhyming with Keira or Tyra. This name may be a feminine variation of Cyrus but is also a Persian name that stands on its own. One noted bearer is writer Cyra McFadden.