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The streamlined Spanish Ruben is much more popular than the original Biblical Hebrew version in the US.

Ruth, with its air of calm and compassion, was the third most popular name in the 1890s, remaining in the Top 10 through the 1920s. It's still in use today as some parents tiring of Rachel and Rebecca are giving Ruth a second thought. Some see such Old Testament girls’ names as Ruth and Esther rising on the heels of boy equivalents Abel and Moses.

Sabrina, the bewitchingly radiant name of a legendary Celtic goddess, is best known as the heroine of the eponymous film, originally played by Audrey Hepburn, and later as a teenage TV witch; it would make a distinctive alternative to the ultrapopular Samantha. Similar names you might also want to consider include Sabina and Serena.

Sally is a cheerful, fresh-faced girl-next-door name that was originally a nickname for Sarah, but has long been used independently. Sally was popular in the eighteenth century and then again from the 1920s to the 1960s--it was just outside the Top 50 around 1940. Though it hasn't been heard as a baby name for decades, we can see Sally bouncing back, especially after her exposure as young Ms. Draper on Mad Men--the Nameberries rank it at Number 621, and it's a Top 100 name in Sweden.

Short for Samuel or long for Sam, Sammy is a sweet midcentury nickname name that we can see coming back.

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.

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.

Shane ambled into the picture via the 1953 movie, adding a cowboy twist to its Irish essence. Shane is even more popular in Ireland than in the USA or the UK. Singer Siobhan O'Connor and actor Kevin Sorbo have sons named Shane.

This Old Testament place name was in the Top 10 fifty years ago, but now Sharon, along with sound-alike Karen, have fallen out of favor.

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.

A common surname in Ireland that projects a complex image for a short-one-syllable name, combining spirit and substance.

Sheila peaked in popularity from the 1930s to the 1960s (she reached Number 49 in 1965), along with Maureen and Colleen; parents today would probably go back to the original Cecilia or forward to Shea.

Shirley Temple almost single-handedly lifted the gloom of the Great Depression, and in tribute (and perhaps wishing for a similarly curly-headed, dimpled darling of their own), thousands of parents of that generation gave their little girls her name. In 1935, Shirley was the second most popular girls' name in the country with more than 42,000 babies named Shirley.

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.

Sofia is a variation of the Greek name Sophia, which was derived directly from sophia, the Greek word for wisdom. It was the name of a Roman saint—the mother of Faith, Hope, and Charity—and queens of Russia and Spain.

Spencer is a name that has everything: it's both distinguished sounding and accessible, dignified but Spencer Tracy-like friendly. Picked by several celebrities (a couple of times even for a girl), adding up to an enthusiastically recommended choice.

A key cheerleader in the nickname game of the 1970s, Stacy is now the mom. Consider Stacia, or the original Anastasia.

One of the old-school nicknames -- think Ray, Vince, Frank -- that's on the brink of coming back into style. Name him Stanislav or Constantine and he'll have a groovier long form to fall back on.