Alfie is a Top 20 name throughout the British Isles, where retro nickname names are mega-popular, but it hasn't really been picked up in the US yet. Both Alfie and rising star Archie are spunky nickname possibilities with a bit of an English accent.

 Thanks to some louche fictional characters, Alfie has long had a lovable rogue image. First there was the Michael Caine character in the 1966 eponymous film, followed by a 2004 remake starring Jude Law. In Britain, the name was given a big boost by the Alfie Moon character in the long-running soap, EastEnders. 

There have been several Alfie songs as well, most recently one by Lily Allen written for her little brother.

Alfie

Archer is an Anglo-Saxon surname that feels more modern than most because of its on-target occupational and Hunger Games associations. And it's a nice way to bypass the clunky Archibald to get to the cool nickname Archie.
 But have a look at that amazing popularity chart below: After 1889, Archer took a 130-year nap, resurfacing on the Top 1000 in 2009 and now shooting straight upwards. Five years ago, we named Archer one of our Hottest Names of 2011—and, indeed, it jumped 102 places that year, thanks in part to Archer's similarity to popular Asher and its cross-gender appeal. Moms may like its literary gentility and dads its tough-guy FX cartoon appeal. Or, of course, vice versa.
 Trivia tidbit: Archer is the name of Dr. Doolittle's father.

Archer

The simple and attractive Bryn is well used for boys in Wales, and does have a history as a male name in the US, although both Bryn and Brynn are currently far more popular for girls.

 Fans of British TV sitcom Gavin and Stacey will recognize it as the name of Stacey's lovable and eccentric uncle, played by Rob Brydon.

Bryn

Caelan

A handsome Irish name for boys, very popular in that country, but in the US this traditional spelling might cause pronunciation problems. Still, whether Cian or Kian, it's simple and straightforward enough for the initiated. Cian is rising in the British popularity charts. 
This was the name of several legendary figures, including Cian, son of the god of medicine. His own son was Lugh, the sun god and father of the Ulster warrior Cuchulain and Cian is also the name of the son-in-law of the high king Brian Boru. So very well connected.

Cian

Extremely popular in Ireland, Ciaran is also well used in England and is beginning to be adopted by parents in the U.S., though usually via the more American-friendly Kieran spelling. The Irish spelling is, however, becoming more familiar on this side of the Atlantic, due to the rising popularity of Belfast-born actor Ciaran Hinds.
 Although it was the name of twenty-six saints in Ireland, Ciaran was not used as a secular name there until the 1950s.

Ciaran

Both offbeat and upbeat, this evocative traditional Irish name that runs through Celtic mythology is known here via award-winning novelist Cormac McCarthy (born Charles). The author's adopted name is related to Cormac Mac Airt, one of the great legendary high kings of Ireland.
 In two of the Harry Potter movies, Cormac McLaggen is a Gryffindor student.
 And for all you popularity-phobes, Cormac has never yet made it onto the American Top 1000 list.

Cormac

Declan is the Anglicized form of the Irish name Deaglán. St. Declan was one of the first missionaries to bring Christianity to Ireland, preceding St. Patrick. Originally from Wales, he founded the monastery of Ardmore in Ireland.
 
Declan, the amiable and appealing name of an Irish saint (and the real first name of singer Elvis Costello), is very popular in the Emerald Isle and beginning its certain climb to popularity here, after debuting on the American list in 1998. Like Aidan and Liam, Declan is shaping up to be an American hit.
 
Declan Porter is a current character on Revenge. 
 Cyndi Lauper spelled her son's name Declyn.

Declan

Though Eoin is a Gaelic form of John, its Anglicized pronunciation links it directly to Owen. Eoin is currently a Top 30 name in Ireland. Other variations: Ewan, Ewen, Evan and Eoghan (pronounced as Owen but also translated as Eugene).

 Eoin Colfer is the author of the Artemis Fowl books.

Eoin

Evan has a mellow nice-guy image that has kept it popular, while it has been widely used in Wales since the nineteenth century. And interestingly—and surprisingly—enough, Evan charts highly for boys in France.
 Evan was derived from Iefan, a Welsh version of John. John is ultimately a derivative of the Hebrew name Yochanan, comprised of the elements yo, meaning "God" and chanan, "to be gracious." Evan is actually a Hebrew word itself, meaning "rock."
 
Jenny McCarthy has a son named Evan, and some other modern associations are former Senator Evan Bayh, novelist Evan Hunter, and the movie Evan Almighty. It is also sometimes used for girls, as in actress Evan Rachel Wood.

Evan

Finley has been used for both sexes for enough years to become one of the most <a href="https://nameberry.com/unisex-names">popular unisex names</a>. Given nearly equally to boys and girls, Finley appeals to contemporary parents as a truly gender neutral choice. <br/
Finley is a Scottish royal name (it belonged to Macbeth's father) riding the wave of Finn names. Chris O'Donnell used it for one of his sons, and Angie Harmon and Jason Sehorn named their daughter Finley. 
 <br/Finlay is another, much less popular spelling. A boy Finley can be called either Finn or Lee.

Finley

Finn is a name with enormous energy and charm, that of the greatest hero of Irish mythology, Finn MacCool (aka Fionn mac Cuumhaill), an intrepid warrior with mystical supernatural powers, noted as well for his wisdom and generosity. 
 Finn was chosen by cool couple Christy Turlington and Ed Burns for their son, and also by Jane Leeves and Autumn Reeser. Played by Cory Monteith prior to his death, Finn Hudson was a prominent character on Glee.
Other up-and-comers in the same family: Finlay and Finley, Finian and Finnian, Finnegan and Finnigan, and, from Germany, Fynn.

Finn

Flynn, a charming Irish surname, is still used only quietly, despite its easygoing, casual cowboy charm, unlike Finn which is a star of this genre. Flynn was the choice of Orlando Bloom and Miranda Kerr for their baby boy, and is also the middle name -- used as his first -- of a son of Miranda's fellow supermodel Elle Macpherson, of Gary Oldman's son Gulliver and Marley Shelton's daughter West.
 Flynn Rider (born Eugene Fitzherbert) is the dashing animated hero of the Disney film "Tangled." On TV's "Breaking Bad", Flynn was what young Walter Jr. tried to rename himself. The name was long associated with the swashbuckling Errol Flynn, inspiration of the phrase "in like Flynn." Some may connect this name to controversial former National Security Adviser Michael Flynn
 Flynn entered the U.S. Top 1000 in 2011, and is a highly popular choice in Australia and New Zealand.

Flynn

A friendly Irish and Persian name chosen by Geena Davis for one of her twin boys, whose father is Iranian.

Irish and Iranian has to be one of the most diverse pair of roots of any name. Kian can be a variation of the Irish Cian, very popular in its native land. While Cian is fairly rare in the US, Kian has been rising through the ranks for the past two decades. The Irish Cian or Kian is pronounced with the emphasis on the first syllable, KEE-en, rhyming with Ian.

The Iranian Kian is pronounced kee-AHN, like the first two syllables of Keanu as in Reeves.

Spelled Kian, the name is popular throughout the English-speaking world as well as in Germany, Sweden, and Switzerland, but it's impossible to say whether the parents choosing it are going for the Irish or Persian version. Some undoubtedly don't care and simply like the name, no matter what its origin.

Kian

Although this surname name is closely related to the more common Irish name Kieran, Kiernan is also a well used family name, tied to thirty-three ancient chieftains. It has on a few occasions been used for girls.

Kiernan

Lucan is a rarely heard Irish name, a Luke form with the trendy an ending. 

Lucan

Lubin

An Irish last-name-first-name that could make a child feel distinctive, while still having the regular guy nickname of Quinn. Christine Taylor and Ben Stiller spelled their son's name Quinlin. 

 Quinlan would make a fitting choice for a fifth baby, since quin in Latin signifies five.

Quinlan

Quinn is an engaging Celtic surname that is on the rise for both genders. Quinn has started leaning decidedly toward the feminine thanks to a female cheerleader character on the television show Glee. It retains some testosterone from "The Mighty Quinn," the name of a movie, a band, and a Bob Dylan song. 
 Sharon Stone has a son named Quinn. Other ideas for boyish names like Quinn: Quinton, Quincy, Finn.

Quinn

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.
 
Reuben is a rich and resonant underused Old Testament choice with several ingredients for success: its biblical pedigree, the distinction of being one of the <a href="https://nameberry.com/baby-names/158/hebrew-names">Hebrew baby names</a> that's never been heavily used, and a friendly, down-home image. Maybe the current crowd of Jacobs will grow up and follow their biblical namesake by calling their own sons Reuben. 
 Only downsides: Reuben is also known as a sandwich, and is the source of the word rube.
 Panama-born salsa singer Ruben Blades represents the Latin version (with the accent on the second syllable); Reuven is the name in Hebrew.

Reuben

Ronan is the compelling legendary name of twelve Irish and Scottish saints that is now drawing some deserved attention; this cousin of the ascending Roman and Rowan was chosen by actor Daniel Day-Lewis and his writer-director wife Rebecca Miller in 1998, and more recently by actress Catherine Bell.
 Ronan is a Harry Potter name—that of a centaur who lives in the Forbidden Forest. Ronan Keating is an Irish singer, Ronan Farrow is a TV personality and Hollywood scion, and its presence as a surname is represented by young actress Saoirse Ronan.

Ronan

A cool, windswept, surfer babe-magnet in 1965, a nice dad -- or even granddad -- today. 

Scott

See the popularity graph below for the name Theo? It's been heading straight uphill since 2010, when it hopped back onto the Top 1000 after a 60+ year absence.
 
Now in the Top 100 in this form, Theo's popularity is even wider given its common use as a nickname for Theodore, which made the Top 10 for the first time in 2022. This might be the generation of Theos.
 
Theo's newfound popularity extends far beyond the US and the rest of the English-speaking world. It's currently a Top 100 name in Germany, Brazil, Scandinavia, and beyond, as well as being a popular choice for pets.
 Theo first made an impact as the name of the only son on "The Cosby Show," earlier it was associated with Vincent van Gogh's supportive brother Theo.

Theo

This jaunty unisex nickname name has recently been given a shot of testosterone via actor Tobey Maguire and the gruff, erudite character on West Wing.

Toby

KiwiAussieMum's list "Emily's Boys' Names" of 24 great name ideas: Alfie - Toby!