Reuben is derived from the Hebrew words ra’a, meaning "to see, to understand," and ben, "son." As a phrase it translates to "behold, a son." In the Bible, Reuben is Jacob's first-born son by Leah and the founder of one of the tribes of Israel.

One of many R- boys’ names that started as a nickname for a redhead, Russell had a measure of popularity from the early twentieth century through the 1950s. But it's now lost much of its color -- except for a few dynamic bearers, actors Russell Crowe and Russell Brand and sports stars Russell Westbrook and Russell Wilson.

Rudy is one of those names that has been consistently in the US Top 1000 since the early 20th century without ever becoming overwhelmingly popular. It peaked back in the 1930s, when it briefly entered the Top 250, though more recent years have seen it make the latter end of the charts. Certainly more stylish than its parent name, Rudolph, which has been relegated to reindeers in English speaking countries, Rudy was given to 300 boys in a recent year.

Simultaneously a name of Hindi and Sanskrit origin, a spelling variation of the popular Rowan and an anglicized form of Irish Ruadhán, Rohan is a cross-cultural choice.

A slim, elegant, silvery surname, Reed could be a banker or a sculptor, and therein lies the appeal of this simple yet distinctive name. The versatile Reed can be seen as a grass-like nature name and a musical name.

Rio is a reductive ranchero place-name with an attractive Tex-Mex lilt. No Doubt's Tom Dumont has a son named Rio Atticus.

Now that many dogs are named Max, it's safe to use this sleek, solid, regal name again for your child. And with the charm of its final x, its regal meaning, and its offbeat simplicity, Rex is definitely one to consider.

A top ranking choice in England and Wales, making frequent appearances on the Telegraph Announcments, Rafe feels equal parts rugged, amiable, and posh. Traditionally seen used a variant of Ralph (itself from the Old Norse Ráðúlfr), it came into use in the 17th century to reflect this particular pronunciation.

Simple, short, and cool, Ray gives off retro vibes thanks to its 20th century popularity, and its links to jazzy Ray Charles and Ray-Ban sunglasses. A popular middle name for boys, it is well established as a given name too.

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.

Rupert is a charming-yet-manly name long more popular in Britain (where it's attached to a beloved cartoon bear) than in the U.S. Yet we can see Rupert as a more stylish, modern way to honor an ancestral Robert.

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.

Best known as a feminine diminutive, Romy is used now for boys too; has a lot of energy and bounce. Can be a short form of Roman or Romeo or a name in its own right. Remy is another related choice, or you might want to go all the way to Romulus.

We've seen Ray regain his cool, but could this country/cowboy name epitomized by Roy Rogers (born Leonard Slye), Acuff, and Clark, do the same?

Rufus is a rumpled, redheaded (it was the nickname for red-haired King William) ancient Roman name popular with saints and singers (e.g. Rufus Wainwright); now, Rufus is on the cutting edge of cool.

While Rumi has received attention in the contemporary US as the name of Beyonce and Jay-Z's young daughter, it's most famously the name of a (male)13th century Muslim mystic and poet. The most famous Rumi poem,"The Diver's Clothes Lying Empty", has inspired many modern literary works, including a novel with a similar title by Vendela Vida.

As a stylish name, Ryker has three big things going for it: its Ry beginning (as in Riley, Ryder, and Rylan), its two-syllable rhythm, and its er ending. A nice surprise for many is it's "rich" meaning. While this may not be a factor beyond New York City, there is an infamous prison there called Riker's Island. Ryker is one of the trendiest German names for boys in the US.

Even less subtle than Duke or Earl, this name shot up the popularity charts in 2013, the same year young Prince George was born and the craze for all things royal (and Royal) began. Today, it's a leading boys' name on Nameberry's own popularity charts.

Given that Rome is arguably the most important city in European history, it has been used as a first name remarkably little. However, with Roman in the Top 100 and one-syllable choices in vogue, it was only a matter of time before parents started looking toward the city's name as a potential baby name.

This sleek, warm-hued spelling spin on Rowan was chosen by Sharon Stone for one of her three sons back in the 2000s and it has since risen in popularity in the US. While it remains a long way behind its sometimes sound-alike Rowan, it was still given to more than 140 babies in a recent year.