Lost Girl

Ryan’s use as a given name was inspired by the surname Ryan, a variation of the Irish O’Riain meaning "son of Rían." Rían is composed of the Irish-Gaelic elements rí, meaning "king" and an, a diminutive suffix. Ryan is considered a unisex name in the US, where variant spellings Ryann and Ryanne are also valid for girls.

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.

Sam has long been used on its own for boys, as accepted standing by itself as it is as a short form of Samuel. Straightforward and down-to-earth, Sam is the name of the son of the co-stars of The Americans, Keri Russell and Matthew Rhys. Sam is one of the most popular names that start with S in the Western world, ranking higher in several European countries than it does in the US, where it's trended downward since the 19th century, though it's always been in the Top 1000.

Samir has a pleasing sound and lovely meaning. One of those distinctive names that can also fit right in—and you could always call him Sam.

Serena, a name used since Roman times, was given fresh life by tennis star Williams, and then again with the leading character on Gossip Girl, Serena van der Woodsen. There have also been Serenas on soap operas and other shows from Bewitched to Law & Order.

Out playing shuffleboard at his condo and not expected back for several generations -- unless it morphs into a girls' name, a la Sydney.

Shawn is a phonetic spelling of Sean that may be past its peak – it was a Top 30 name in the early 1970s – but is still quite popular for boys: over 500 baby boys were named Shawn in the US in the most recent year counted vs 800 given the original Sean spelling.

Also spelled Sigfrid, this hefty German name has an appropriately majestic meaning: "victorious peace". Fittingly, a famous bearer was the English World War I poet and pacifist Siegfried Sassoon. Sassoon was named after the hero of a Wagner opera, which in turn was based on a tragic hero from German legend.

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.

Siobhan is the Irish variation of Joan, which is derived from the ancient Anglo-Norman name Jehanne. In this way Siobhan is indirectly related to the name Sinead—the Irish form of Jeannette, which also derived from Jehanne—although Sinead is not a nickname for Siobhan. Siobhan was the name of several early Irish queens and was introduced to the American public by the actress Siobhan McKenna.

An elegant, continental name for the post-Steve era. It debuted on the US Top 1000 in 1949 and has been on the list every year since except for a year off in 2008.

Stella is a name with star quality and sparkle, that manages to sound both ethereal and earthy. Celestial but not otherworldly, it lands somewhere between the popular Ella and bold Seraphina.

Tamsin is an offbeat name occasionally heard in Britain and just waiting to be discovered here. U.K. actress Tamsin Greig is a star of the show Episodes, Tamsin Olivier is the daughter of Joan Plowright and Sir Laurence Olivier..

Occasionally used as an independent name, but why.

Valentine is an attractive Shakespearean name with romantic associations, but those very ties to the saint and the sentimental holiday have sent it into a decline, one which we think may be about to turn around.

Velma likely originated as a phonetic spelling of the German name Wilma, itself derived from Wilhelmina. Velma Dinkley is a smart, if nerdy, character in Scooby Doo.