In its three most popular spellings -- Alan along with Allen and Allan -- this midcentury favorite has tended to skew older. It was a Top 100 name from 1938 to 1971, peaking at Number 40 in 1951. Alan has had leading roles on recent TV, in shows like Two and a Half Men, 24 and Boston Legal.
 Current bearers include Alan Alda, Alan Cummings, and writers Alan Bennett and Alan Ayckbourn.
Alan is a venerable Celtic name, first used in England in the Middle Ages. We like the Welsh spelling Alun.

Alan

An attractive ancient Irish saint's name that conjures up a beacon of light, this <a href="https://nameberry.com/list/328/irish-baby-names-for-boys">Irish name for boys</a> is well-used in Ireland but rarely heard in the US.

Beacan

This more user-friendly Anglicized form of Beacan, could profit from its kinship with the popular Beckett--with which it could share the nickname Beck. Becan is an Irish saint's name, attached to the founder of a sixth century monastery.
 For ease of pronunciation, it can also be spelled Beccan.

Becan

Brennan is a winning Irish surname name, more modern than Brian or Brendan, more unusual than Conor and Aidan. The only possible problem with Brennan: people might think you're saying Brendan.
 Brennan eased onto the very bottom of the popularity list in 1966, and has pretty much remained in the Top 1000 ever since.

Brennan

Brogan is a cheerful Irish surname that would fit right in with the Logans and Br-starting names now trendy for boys. It's been on the pop list for the past three years, though it's sliding again. Its history includes Saint Brogan (Broccan in Gaelic), who was Saint Patrick's nephew and scribe.
 In "Shrek Forever After" Brogan was an ogre voiced by Jon Hamm. Supposedly, the character was almost called Gnimrahc--or Charming spelled backwards. Brogan is better.

Brogan

Caledon, the name of the arrogant Billy Zane character in "Titanic," is an Irish place-name related to Caledonia, the Latin word for Scotland thought to be derived from the ancient Celtic word for "hard."  Cal is a wonderful nickname, and Caledon an inventive way to get there.

Caledon

Conlan

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

Fresh choice that could pick up where Dylan and Logan left off. 

Dolan

This Irish saint's name makes an attractive alternative for Dylan or Donald. 

Donnan

One of the first of the appealing Irish surnames to take off in this country, this <a href="https://nameberry.com/boys-names">boys’ name</a> has long outgrown its "Mellow Yellow" association, which came via the single from a sixties singer-songwriter named Donovan. 
 Donovan was Scottish-born Donovan Leitch, whose name was probably inspired by his father Donald's. He proved to be an adventurous, celestial namer himself--three of his children are Astrella Celeste, Oriole Nebula and Ione Skye.
 Another potential namesake is retired pro bowl quarterback Donovan McNabb.
 Donovan was in the USA Top 1000 as early as 1900.
 Related options are surname Donegan and place name Donegal.

Donovan

Finnigan is another way to spell Finnegan, one of the energetic Irish surname-names in vogue now. One note: While Finnigan, Finnian, Finley and so on are appealing names on their own, you don't need to use a longer form to get to Finn, which is a perfectly proper name all on its own.

Finnigan

Fintan is an ancient Irish saints' name that in legend is also the name of the only person to survive The Flood.  Popular in modern Ireland, Fintan is ripe for export to the US where it is rarely used but could make an excellent long form for the stylish Finn.

Fintan

The name of a historic Irish leader, Gannon has a solid, yet spirited feel. It was one of the fastest-rising names of 2014, but that trend didn't continue. One pop culture influence was the name of Teen Mom 3 son Gannon Dewayne McKee.

Gannon

Keegan is one of a clan of spirited Irish surnames starting with K and ending with 'n'--this one with the cheery double 'e' in the middle-- that are appealing to an increasing number of parents. It derives from Mac Aodhagáin, meaning "son (or descendant) of Aodhagán," a diminutive of the Irish name Aodh--pronounced Aye.
 The related name Egan is another recommended possibility.

Keegan

This name of three ancient saints, one Wayans brother, and an NFL wide receiver makes an energetic choice.

Keenan

This is one of several similar sounding Gaelic surname names that would make perfectly acceptable choices--others are Kennan, Keenan and Kenyon.  Another possible meaning is "descendant of the fair ones," referring to the Norse invaders.

Kennon

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

Rogan makes a great, roguish alternative for the more popular Logan, Ronan and Rowan.


Rogan

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

With its gentle sounds and earthy vibes, the name Rowan feels like a fusion of different styles. A word name, a surname, and a gender-neutral name, Rowan is rustic but trendy, blending the vibes of both Owen and Oakley. 
Just as it’s hard to fit Rowan into one category, it’s equally difficult to identify one definitive root. It could be considered an Anglicized form of the Irish name Ruadhán, meaning “little redhead” and it was used as an English surname before it became a given name. 
Alternatively, it could be linked to the rowan tree, whose name derives from Old Norse and means “to redden.” In folklore and mythology, rowan trees are seen as a symbol of protection and of life, adding extra meaning to Rowan. 
 To complicate matters further, some scholars identify Rowan as a girls’ name, deriving from Rowena and Rhonwen, meaning “famous friend” or “white spear.” This gives it solid credentials as a unisex name and lends it a slightly more rugged vibe. 
What is certain, however, is that Rowan has quickly become a stylish choice, chosen for over 3000 boys every year. Once an obscure name in the US, it rapidly climbed the charts during the 2010s and has now entered the Top 100 Boy Names for the first time. 
Rowan is popular in the UK, Canada, and the Netherlands too, but even more so among Nameberry users, where it ranks in the <a href=“https://nameberry.com/popular-names/nameberry/boys/allNameberry Top 1000”> Nameberry Top 30.</a> 
The most prominent bearer of the name is probably Rowan Atkinson, the British comic actor of Blackadder and Mr Bean fame. Other namesakes include the former Archbishop of Canterbury, Rowan Douglas Williams, and the Australian swimmer, Rowan Crothers. Pokémon fans and Sarah J. Maas readers might recognize it too as the name of a character in both the game franchise and in the Throne of Glass series. 
Gentle but powerful, stylish but not oversaturated, Rowan may well continue to climb the charts, so if you love Rowan but want to stray from the trends, Ruan, Sylvan, Lorcan, Lennox, Wren and Sloan might inspire you.

Rowan

Sullivan is a jaunty Celtic three-syllable name, with a real twinkle in its eye. It was immortalized in the 1930s classic film Sullivan's Travels and was chosen for one of Patrick Dempsey's twin boys. Nickname Sully is equally jaunty.
 The third most common surname in Ireland, Sullivan's heritage dates back to the third century. Countless distinguished surnamed Sullivans include Sir Arthur, half of composing team Gilbert & Sullivan, Helen Keller's teacher Annie, Chicago architect Louis, early boxer John L. and dour columnist/TV emcee Ed.
 Other celebs with boys named Sullivan: singer Tom Waits and actor James Marsters. Heroic pilot Chesley Sullenberger is known as Sully, and a featured character in Pixar's Monsters, Inc. and Monsters University was Sullivan.

Sullivan

Jessi19lynn96's list "Cool Irish boy names that end in -N" of 23 great name ideas: Alan - Sullivan!