Agatha Christie's Poirot

Old time nickname that's starting to sound fresh again, à la Alfie and Freddie.

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.

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.

To those who remember, Rhoda is still reminiscent of the brassy Bronx 1970s sitcom Rhoda Morgenstern. But Rhoda has a much longer history--it is a name that can be found in the New Testament as a servant girl in the house of Mary, mother of John. Later, Rhoda appeared in the novel Vanity Fair and the Shaw play Man and Superman.

A classic old Norman name popular for a thousand years and favored for kings (Richard Nixon was named for Richard the Lionhearted), as well as the hoi polloi (as in every Tom, Dick and Harry), Richard was the sixth most popular US boys’ name in 1925, and was still Number 8 in 1950, but is now much less popular.

Robert was the Number 1 boys' name in the US in both 1925 and 1950, and in fact was in the Top 25 for more than a century, giving it true classic status. Strong if not quite stylish, Robert remains in the Top 100 for baby boys as a family favorite.

Now that it's no longer fashionable for girls, Robin is rising for boys again. Robin Hood, Robin Williams, Christopher Robin, and Robin the Boy Wonder are all male namesakes, after all. It reentered the US Top 1000 boys names in 2015 for the first time since 1999 and continues to bounce around the lower end of the Top 1000.

The aristocratic--if not haughty--Roderick was nevertheless consistently in the Top 1000, reaching as high as Number 221 in 1967, when it was not uncommon to run into a Rod or a Roddy. It's at a low point right now, but we can envision it being revived as a neglected, dignified grandpa name, perhaps when Rod is no longer a potentially embarrassing nickname..

In the World War II era, Roger had nothing but the most positive associations, actually used by military personnel to mean 'Received and understood'--or A-OK, and though it is now on extended furlough, it does have a long and distinguished history. Introduced to England after the Norman Conquest of 1066, Roger soon became very popular there, with nicknames Hodge and Dodge, and had a long run later in the U.S, remaining in the Top 100 for 55 years.

To many people, Ronald is off playing shuffleboard with Donald, though others aren't swayed by its old man image. In the Top 10 in the late 1930s through the mid-1940s, the name later came to be strongly associated with President Reagan, along with his nicknames, Ron and Ronnie—as well as with the McDonald franchise mascot. A more youthful bearer is the likable character Ron Weasley in the Harry Potter series. In the early days of Hollywood, Ronald Colman was a dashing matinee idol.

The name of a sympathetic character in the best-selling novel The Secret Life of Bees, though it feels more stylish these days spelled Rosaline.

Rosalie hit its apex in 1938 and then slid straight downhill until it fell off the U.S. Top 1000 completely in the 1980s, only to spring back to life in 2009 as the name of a character in the Twilight series. The beautiful vampire Rosalie Hale has breathed fresh life back into this mid-century name, and the fact that the character is both sympathetic and relatively minor means Rosalie has the chance to thrive again as a baby name without feeling unduly tied to Twilight.

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.

Despite appearances, Rosemary is not a "smoosh" name, not even a traditional one. The name derives from two Latin terms "Ros" meaning ‘dew’ and "Marinus" "meaning "of the sea". The plant was termed ‘dew of the sea’ due to its salty texture and its ability to thrive in coastal climes. Only after the Middle Ages did the English names of Rose and Mary become interchanged with the name Rosmarinus and give us the modern name we use today.

A fabled storybook name via the heroine of Sir Walter Scott's novel Ivanhoe (1819), which featured a heroine called Rowena of Hargottstanstede, and also a Harry Potter name, as Rowena Ravenclaw, founder of one of the Hogwarts houses.. Rowena has some old-fashioned charm, though most modern parents seem to prefer Rowen. Pronunciation, however, is NOT like Rowen with an a at the end, but with a long e and an emphasis on the middle syllable. She was on the popularity list until 1963, several years in the Top 500.

Rough-and-tumble surname with some degree of charm.

Sure, he'd probably get a certain amount of red-nosed teasing around the holiday, but a boy named Rudolph could probably take it. Besides, he's got other, more distinguished namesakes -- the great ballet dancer Nureyev, silent screen Lothario Valentino and 9-11 Mayor Giuliani.

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.

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.