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.

Seraphina is one of the most-searched name on Nameberry, destined for even greater popularity. The highest-ranking angels, the six-winged seraphim, inspired the lovely name Seraphina.

Sadie started as a nickname for Sarah, but their images couldn't be more disparate. Where Sarah is serious and sweet, Sadie is full of sass and fun.

Simon is pure and simple (not in the nursery rhyme sense), and an appealingly genuine Old and New Testament name that's not overused. These factors make Simon a stylish yet classic choice.

Sebastian is an ancient martyr's name turned literary, and Little Mermaid hero—think Sebastian the Crab—that's more popular than ever, as a classic-yet-unconventional compatriot for fellow British favorites T Theodore and Oliver.

Sophia, which was the Number 1 girls' name in the US from 2011 to 2013, is among the top girl names in the Western World, with a sensuous sound and high-minded meaning. A real winner, Sophia reached the top of the charts without losing any—okay, much—of its sophisticated beauty.

Samuel has been so popular for so long that it's hard to believe it's still climbing, at its highest point since the 1890s.

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.

Scarlett Johansson is doing more for this sparky southern name than Scarlett O'Hara ever did. Since the turn of the 21st century, Scarlett has gone from an obscure literary name to one of the most popular girls' names starting with S, right after longtime favorites Sophia and Sofia.

The image of the lovely Lady Sybil, tragic youngest daughter of the Crawley family on Downton Abbey is likely to go a long way towards reviving this almost forgotten name, off the list since 1966 and most popular in the 1920s and '30s.

Although Susan had her heyday from the thirties to the sixties, and is now common among moms and new grandmas, and though most modern parents would prefer Susanna/Susannah, we have spotted some flickers of interest in a revival. It still retains a certain black-eyed-Susan freshness.

Game of Thrones author George R. R. Martin is a master namer, and this unusual choice from India is beginning to be heard in nurseries as well as on television. Sansa was perhaps slower to catch on than other names such as Arya and Khaleesi as Sansa Stark was in the first seasons of the show a weak and compromised character.

An attractive French word name known here via former child TV star Soleil Moon Frye, aka Punky Brewster. It started to be lightly used in the U.S. in the 1920s and is now attracting some attention as both a sunny nature and an international word name. It's currently in the Nameberry Top 500.

Solomon, a name that evokes wisdom and peace, is an Old Testament name that, along with other patriarchal classics, is finally beginning to shed its long white beard and step from the pages of the Old Testament into modern nurseries.

The long-neglected name of Adam and Eve's third son after Cain and Abel, Seth is appreciated for its gentle, understated presence -- and strong middle-name potential. It reached a high of Number 63 in the year 2000.

There's definitely a cold front of names for winter babies moving in, with Summer, Spring and Autumn giving way to Winter--plus North, January, Frost--and Snow. This name feels brisk, fresh, pure, evocative -- and magical. A haunting middle name choice.

Santiago is a spirited Spanish name with great crossover potential. It's a place-name (a city in Chile), a surname, and the name of the patron saint of Spain.

Though it has literary credentials--making an appearance in Jane Austen's Mansfield Park and as the mean-spirited teacher Severus Snape in the Harry Potter books, most modern parents would find it too--well--severe.

If ever there was a one-person name, it's probably Sherlock. But Sherlock Holmes the character has arguably never been hotter: he's been played by Robert Downey Jr., Ian McKellen, Jonny Lee Miller and, most memorably, Benedict Cumberbatch, in various film and TV adaptations over the last few years. So you never know.

Could there be a more poetic name than Sonnet? Actor Forest Whitaker was inspired to choose it for his daughter.