A form of ancient name newly popular in Eastern Europe, Rasmus is rugged and distinctive - and on trend in Estonia and Finland. Virtually unknown in the U.S. but with its philosophical roots and uplifting meaning, Rasmus seems prime for use. The Rasmus is a Finnish rock band.

With strong sounds but a whimsical feel, Reverie is a word name associated with being in a dreamy, ethereal state, of being lost in a daydream, or coming up with a pleasant fantasy for the future. Similar in cadence to popularly Everly, it was given to around 80 girls in a recent year.

The name of the sun god of Egyptian mythology could only be used in combination with a longer name.

An Anglicized spelling of the Welsh Rhys, this traditional boys' name got a big boost for girls in the early 2000s, thanks to the high-profile Ms. Witherspoon (who was actually born Laura Jeanne Reese, her second middle being her mother's maiden name). This spelling has been on the decline for boys since 2003, possibly for the same reason, but remains a strong, simple choice which might pose fewer spelling and pronunciation issues outside of the UK than the Welsh original.

Strong and solid, with a touch of foreign intrigue, it's the most popular of the rain-related names, with a variety of pronunciations—RAY-na, rah-EE-na, or RY-na. Alternate spellings Reyna and Rayna currently rank higher in the US.

Remington Steele was the perfect name for an upper-crust action hero on 1980s television. Now, Remington is catching fire along with a new generation of predatory baby boy names such as Hunter, Gunner, and Colt. Or you might consider it a unisex namewith a buttoned-up British feel and the friendly short form Rem or Remy.

He was the original Roman, Remus's twin and a founder of Rome. But parents attracted to this name are advised to read the legend first. Romulus does have some less than savory characteristics, including killing his twin brother and making Rome in his own image, and is later deified as Quinnius. Romy and Quinn might make good twin names.

Best known as the beautiful heroine to whom Cyrano de Bergerac says, "Your name is like a golden bell".

While the Rowan spelling is in the Top 1000 for both boys and girls, this spelling is much more unusual though maintains the same gender split at nearly four boy Rowens for every girl.

This ultrapopular boys' name is rapidly becoming a hot name for girls; admired for its buoyant Irish spirit.

Roux is the name of the dashing Johnny Depp character in Chocolat. Roux is French from a Latin word meaning russet or brownish red; it's also a cooking term for a mixture of flour and butter that forms the foundation of many gravies or sauces. Most of today's children with this name, pronounced roo, will actually spell it Rue, for the female character in The Hunger Games.

A strong, straightforward Irish unisex surname, with a merry glint in its eye, Reagan has been leaping up the popularity lists, to become one of the top girl names starting with R. Some will inevitably link it to President Ronald, but spell it Regan and it's a Shakespearean name: a daughter of King Lear.

Rook is a choose-your-own-adventure type of name. It has so many meanings and associations, that you have the freedom of choice to decide what resonates with you.

This lovely, quintessentially British appellation, also spelled Rosamond, is the name of a legendary twelfth-century beauty. Rare on these shores, it is more than worthy of importation.

It may seem like an indecisive cross between Roy and Reece, but Royce was fairly popular in the 1930s and '40s. It has seen a resurgence in recent years, helped by some well-known athlete bearers. The Latin pop singer Prince Royce also has brought renown to the name. And some aspirational parents may see the name as a way to associate with the Rolls-Royce brand.

Cool and dignified, sophisticated and modern, Reeve might be seen as alternative to long-familiar Reese. A medieval occupational name, a reeve was an English manor officer responsible for overseeing the discharge of feudal obligations; as such, it has been linked to bailiffs and sheriffs.

This charming mini name began life as a nickname for Rodrigo but has since taken on a life of its own, ranking as an independent name in Portugal, it’s country of origin. If you’re looking to honor a Rodrigo, Roger, or Roderick in your life, Rui is an appealing international option. Ruy is a spelling variation that is more commonly seen in Spain.

A strong and stylish alternative to the super-fashionable Luna, with a double background as a Scandinavian and Japanese name. It's the female form of the Nordic male name Rune, meaning "secret lore", and also a Japanese name meaning "moon" – making this an undiscovered celestial choice.

A popular choice back in the 50s and 70s, Rocky fell into decline after Sylvester Stallone's battered but not beaten boxer character became the overwhelming association many had with the name. Now, nearly five decades on from when the first Rocky movie was released, this tough yet playful name is back in style, ready to forge an identity of its own. Given to around 420 boys in the US in a recent year, it was one of the fastest rising names in the charts.

One of the glamour girl names of the Rita Hayworth 1940s, Rita was once a Top 50 name and stayed on the SSA list until 2002.