While Irish Gaelic spellings add intrigue to a name, they'll prove endlessly confusing. Ailbhe is pronounced like the less intriguing but infinitely simpler Alva.

Ailbhe

This form of Alannah was derived directly from the Gaelic term a leanbh, meaning "child." Though not as popular as the more traditional Alana spelling, it has consistently charted in the US since 2007. Alannah Myles is popularizing this spelling of Alana.

Alannah

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

Aoife, pronounced EE-fa, is derived from the Irish word aoibh, meaning "beauty." Aoife was borne by several different heroines of ancient Irish legend. In one tale, she was the fiercest woman warrior in the world and enemy of her twin sister, Scathach.
 
Aoife is very popular in Ireland, and is catching on across the UK as well. Aoife is sometimes Anglicized as Eva, but the names are from independent origins. Eva shares roots with Eabha and Aoibhe, both also currently popular in Ireland.

Aoife

Aiobhín

Bonnie is an adorable nickname name, heading back up the popularity list after a 50-year nap. A Top 100 girls' name throughout the rest of the English-speaking world, Americans are later to jump on the Bonnie bandwagon but now it's trending here too.
 
Bonnie is a word the Scots really do use for pretty, thus the root of this name, from the French bonne. Along with Betty and Bea, Bonnie, is one of the vintage <a href="https://nameberry.com/search/girls-names/b">girls' names starting with B</a>that are back in.
 Gone With the Wind gave Bonnie a big push when Scarlett and Rhett used it for their daughter. Her full name was Eugenie Victoria, but the pet name came from the fact that she had "eyes as blue as the bonnie blue flag." 
 Bonnie's last moment in the limelight came in the late sixties with the film Bonnie and Clyde, about outlaw Bonnie Parker. Now after a long decline, it's finally showing new signs of life, perhaps thanks to the Bonnies in The Vampire Diaries and The Hunger Games, as well as a new miniseries about the 1930s-era bandits.

Bonnie

Callum, a charming Scottish name high on the list in England, Scotland and Northern Ireland, is rising through the ranks in the US now too. And it comes complete with the easy nickname Cal. Kyle MacLachlan chose Callum for his son. Callum might also be spelled Calum; in Ireland, the name became Colm, and in Scotland it's sometimes used as a pet form of Malcolm.
 
Callum was derived from Latin Columba, a unisex given name meaning "dove." Callum was popular among early Christians because the dove was a symbol of purity, peace and the Holy Spirit. St. Columba was one of the most influential of the early Celtic saints.

Callum

Caoimhe, pronounced (more properly) kwee-va or kee-va, is a pretty and distinctive Gaelic name but one that could well lead to no end of confusion outside the Irish community. Even in its native habitat, it is sometimes spelled Keeva.
 Caoimhe comes from a word with several positive meanings--beautiful, precious, beloved, gentle, and graceful. It's also the name of an Irish saint.
 Caoihme has been very popular in Ireland in recent years.

Caoimhe

Cara is a simple, sweet, Italian endearment that enjoyed its greatest popularity from the 1970s through the 1990s, reaching a high of Number 189 in 1977. Despite the rising celebrity of English model/actress Cara Delevingne, who played Enchantress in Suicide Squad, Cara dropped off the Top 1000 in the US in 2020, perhaps because it sounds too close to the dreaded Karen. 
 I
Cara remains a highly popular choice in Ireland, perhaps used as an Anglicized form of the Irish Ciara or Ceara. the Evelyn Waugh novel Brideshead Revisited, the Cara character is French.
 Damon Wayans took the endearment aspect even further when he named his now-grown daughter Cara Mia.

Cara

The name of an ancient Irish saint is in the contemporary Irish Top 50. While it's one of the rare <a href="https://nameberry.com/list/328/irish-baby-names-for-boys">Irish names for boys</a> that hasn't immigrated to the U.S., it may follow brothers Aidan and Declan to our shores. The t is not pronounced.

Cathal

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

Cora is a lovely, old-fashioned girls' that has been recently rejuvenated by its contemporary-feeling simplicity. In fact, Cora seemed headed straight for the top of the popularity list when the coronavirus pandemic somewhat weakened its appeal.
 
Though she has never been completely out of favor, Cora has had her ups and downs. A Top 20 name in the 1880's, she had sunk to Number 876 in 1988 before reversing course yet again. A more recent inspiration is the appealing American-born Cora Crawley, Countess of Grantham on Downton Abbey. 
 
In classical mythology, Cora—or Kore—was a euphemistic name of Persephone, goddess of fertility and the underworld. Kore was the name used when referencing her identity as the goddess of Spring, while Persephone referred to her role as queen of the Underworld. 
 
Cora gained popularity as a given name after James Fenimore Cooper used it as the name of his heroine, Cora Munro, in his 1826 novel The Last of the Mohicans. 
 
While a complete name unto itself, some parents who love Cora may want to use it as a short form for such names as Cordelia or Coraline. Cora's fashionable sisters include Clara, Nora, Corinne, Corinna and Coralie.

Cora

Croía is an unusual name with a loving meaning that jumped into the limelight when an Irish celebrity chose it for his daughter. Virtually unknown before, it's now among the most popular Irish girl names in Ireland.

Croía

Also Anglicized as Dara and also spelled Daire in its native form, Darragh has an undeniably rugged appeal. It's used for both girls and boys in Ireland, but it's very popular in particular for boys.

Darragh

Virtually unknown in this country, Donnacha is currently in the Top 100 in Ireland.  According to legend, Donnacha was a High King of Ireland until his death in 1064. The English version Donaga (done-a) might be preferable here.

Donnacha

Does Fay really need that e at the end? We vote no, but modern parents disagree: The Faye spelling was used for nearly 300 girls in 2014, vaulting the name back onto the Top 1000 after a 35-year absence, nearly ten times as many babies as received the Fay spelling.
Some people may feel spelling it Faye makes the name more balanced and complete, as Anne of Green Gables famously said about her name. The original Fay, Morgan le Fay, was a sorceress of the Arthurian Legends. Faye may also be used as a short form of Faith.

Faye

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

Fionn, the modern Irish form of Finn, is more popular in Ireland these days than Finn, which is rising fast in the U.S. where Fionn is virtually unknown.  That's probably a good thing, because few Americans would know that Fionn and Finn have the same root and are pronounced the same, like the fin of a fish. It's the namesake of a great hero from Irish mythology, Fionn MacCumhaill, who acquired divine wisdom by eating an enchanted salmon of knowledge.

Fionn

Freya has long been popular in the U.K. but has only taken off in the US in the last decade, along with the entire category of mythological names. Derived from the Old Norse name Freyja, meaning "Lady, noble woman", Freya is the name of the Norse goddess of love, beauty, and fertility. 
 Freya has been one of the fastest-rising names of the past few years and is even more popular in England and Wales. We predict that along with the original Nordic spelling Freyja, Freya will continue its meteoric rise in the coming years.
 Freya can be considered a feminization of Frey or Freyr, the name of the goddess’s brother.
 .There is a Joseph Conrad novel titled Freya of the Seven Isles. A noted bearer was the explorer and writer Freya Stark.

Freya

Fíadh

This member of the aden/ayden extended family is a popular choice not only in the US but across the pond in England, Wales and Scotland as well. Angie Everhart has a son named Kayden Bobby.

Although Kayden in this spelling has been hovering around the Top 100 in the US for several years, with all spellings considered it's much more popular than that. According to our Playground Analysis for 2022, Kayden in all forms ranks among the Top 15 boy names.

What does that mean? No matter how you spell it, if you yell Kayden in the playground, it's likely that more than one little boy will come running.

Kayden

Currently overshadowed by the bright and lively Leo, Leon feels a slightly more serious, more quietly confident than its short and trending counterpart. 
 
Just as leonine as Leo and Leonardo, Leon is popular across Europe, ranking in the Top 40 in Belgium, Switzerland, Norway, Poland, Germany and Finland. It has dipped in and out of the UK Top 100, but as of 2022, it is back. 
 
Leon peaked in the US in the 1920s, but it is on the rise again as parents turn to familiar-but-less-used alternatives to the most popular names. In 2023, it was in the US Top 200, and given to nearly 2500 boys. 
 A name with history, Russian Marxist revolutionary Lev Davidovich Bronstein is better known to history as Leon Trotsky. Leon (LAY-on) has been the name of three French prime ministers, while Leon Russell (born Claude) is a respected singer-songwriter.

Leon

Maeve is a short and sweet name that has become one of the most stylish Irish names for girls in the modern US. Maeve would make an excellent first or middle name choice, with more heft than Mae/May and more modern charm than Mavis. 
 Maeve appears in Irish mythology in two forms, one as the powerful Queen of Connacht, the other as the queen of the fairies. Maeve of Connacht was a warrior queen, famous for starting a war in attempt to steal her ex-husband’s stud bull. Other spellings are Meabh, Medb and Meadhbh, which are connected to mead, a honey-based wine that was produced in many ancient cultures.
 
Chris O'Donnell, Lili Taylor and Kathryn Erbe used Maeve for their daughters. The Irish author Maeve Binchy also is a well-known bearer. Maeve is the name of one of the lead characters on the HBO show Westworld.
 Irish spelling Meabh is popular in Ireland, but not recommended in the US.

Maeve

Millie is back. It's a Top 100 name throughout much of the English-speaking world, though not yet in the US. Millicent would be an appealing long form, but many people are using Millie all by its cute self -- so many, in fact, that it returned to the Top 500 in 2015 for the first time since World War 2 and continues to climb.
Millie is a winner with parents who like their girl names offbeat, frilly, and old-fashioned. Millie is one of the coolest <a href="https://nameberry.com/search/girls-names/m">girl names starting with M</a>.
 Millie was in the Top 1000 here until 1966, peaking at Number 128 way back in 1881; it made its return appearance in 2009. The name got a lot of attention via the 1967 film Thoroughly Modern Millie, set in the 1920s, but today is more closely identified with the riveting young British actress Millie Bobby Brown who plays Eleven in the television show Stranger Things.
 Fashionable relative: Milla or Mila. Milly is also sometimes used. Tillie is another old-school nickname that, like Millie, sounds modern again.

Millie

Méabh

Niamh, derived from the Old Irish Niam, is an ancient Irish name that was originally a term for a goddess. In Irish myth, one who bore it was Niamh of the Golden Hair, daughter of the sea god, who falls in love with Finn's son Oisin and takes him to the Land of Promise, where they stayed for three hundred years. Niamh can be Anglicized as Neve, Nieve, or Neave.

Niamh is particularly popular choice in Northern Ireland, Ireland, Scotland and England and Wales. Niamh Cusack is part of the acting family that also includes Sinead (wife of Jeremy Irons), Sorcha and Padraig. Americans have recently become better acquainted with Niamh via the heroine of Christina Baker Kline's bestselling novel Orphan Train.
Here, the Anglicized Neve would undoubtedly prove simpler, if less intriguing. Actress Neve Campbell pronounces her name (a family name) "NEV", and Neve is the daughter of Conan O'Brien.

Niamh

Odhrán

Oisin is one of the most popular <a href="https://nameberry.com/baby-names/168/irish-names">Irish baby names</a> in its native land, though largely unknown in the US. The original Oisin was the mythological son of Finn McCool and Sadb, the goddess who was changed into a deer. A legendary war hero and poet, Oisin had a name that is also reminiscent in sound of the ocean. Pronounced correctly, this name has an attractive sheen.
 Ossian is another version, reflected in the eighteenth century Ossianic poems of James Macpherson, which transformed him into a Scottish hero and also popularized the names Oscar, Fingal, Selma and Malvina.

Oisin

Paidi

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

This spirited Gaelic classic, which became popular in Ireland via the illustrious twelfth century king Rory O'Connor, makes a highly energetic choice, now used for either sex. Rory's gender split is still trending boyward; it's one of the coolest <a href="https://nameberry.com/search/boys-names/r">boys' names starting with R</a>. 
 In England and Wales, however, the name is virtually never given to girls. It's seen as thoroughly male (and non-female) as Roger or Richard.
 Rory first came to attention in the US in the person of mid-century pin-up boy Rory Calhoun (born Francis Timothy). The name entered the popularity list in 1947, peaking at Number 280 in 1959. 
 Young Irish U.S. Open champ Rory Mcllroy makes a worthy namesake. Bill and Melinda Gates chose Rory as the name of their only son.
 Rory is a popular choice all throughout the UK. Skip baffling Gaelic spellings like Ruari and Ruaidhri and stick with the more straightforward Rory.

Rory

The origin of the Anglicized Ryan, this Irish name feels like a brighter and fresher alternative.

Rían

An authentic choice for your little Irish Rose, chosen by singer Sinead O'Connor for her daughter. 

Róisín

Sadhbh was the name of several real and legendary Irish princesses, including the daughters of Conn of the Hundred Battles, of Queen Medb of Connacht, and of King Brian Boru. It's also written Sabha. One of the most authentic <a href="https://nameberry.com/baby-names/509/irish-names-for-girls">Irish names for girls</a>, it is also unfortunately one of the most difficult to export.

Sadhbh

Sadie started as a nickname for Sarah, but their images couldn't be more disparate. Where Sarah is serious and sweet, Sadie is full of sass and fun.
 Sadie has been soaring in popularity recently. Its last heyday was a century ago. She's been chosen by celebrities including Adam Sandler and Christina Applegate for their daughters.

 In popular culture, there's Somerset Maugham's Sadie Thompson, portrayed by Joan Crawford in Rain, Sadie Hawkins Day, where the girls get to ask the boys to dance, and songs like the Beatles' Sexy Sadie.

Sadie

Before the young Irish actress Saoirse Ronan made her mark in the films Ladybird and The Lovely Bones, few of us had heard this name, let alone known how to pronounce it. But now it is slowly way edging its way into the mainstream, particularly, of course, with parents who have Irish roots. It made its first appearance in the US Top 1000 in 2016, when it was the third-fastest-rising girls' name.
 
Saoirse originated as a baby name in 1920s Ireland as an applied use of saoirse, the Gaelic word for "freedom." The name was first adopted during the Irish War of Independence, when the Irish Republican Army fought the British Army for the liberation of Ireland from British rule. In modern times, Saoirse, as well as a host of other <a href="https://nameberry.com/list/1051/gaelic-names">Gaelic names</a>, are being revived in Ireland, the UK, and the US.
 Another related name Is Sorcha, pronounced SURK-ha and meaning "radiance": in the film Willow, the character's name is spelled Sorsha – another way to pronounce it.

Saoirse

St. Senan was a famed founder of monasteries, whose ruins can still be seen. Legend has it that before he could found it, he had to banish a great monster.  Other versions are Sionan, Sinan, Synan and Sinon. Seanan is also a pet form of Sean.

Senan

Shay has an old-fashioned feel due to its association with the word for a kind of horse-drawn carriage and at the same time seems modern thanks to its simple straightforwardness.  Use Shay as a phonetic equivalent of the Irish surname Shea or the Hebrew male name Shai, or as an abbreviated form of such names as Seamus or Shane.

Shay

Sonny is one of the generic boy nickname names making a surprise reappearance, and it was recently used by actor Jason Lee. Another surprise: It's been on the US Top 1000 list every year since 1927, reaching a peak in 1975, when it hit Number 428.
 Most celebrities who've gone by Sonny have had a formal birth name, including Sonny Bono (born Salvatore), Secretary of Agriculture Sonny Purdue (George Ervin), boxer Sonny Liston (Charles), and jazz musician Sonny Rollins (Theodore Walter). Even fictional Sonny Crockett on Miami Vice was born James.

Sonny

The name of several ancient kings and princes of Ireland, Tadhg became so common at one point that it was used to represent a kind of Irish Gaelic everyman, or man in the street, as Paddy and Mick would later. Tadhg has seen a major resurgence in recent years and is also now ranked in England. 

It is sometimes used as the Irish equivalent of Timothy and is also anglicized as Teague and Thaddeus. Tadleigh and Thad are pet forms. Pronunciation is like tide ending with a g.

Tadhg

Tiernan is the slightly edgier and sharper cousin of Kiernan. This is one Irish surname that is attractive but distinctive; Tierney is another, related, option. 
 Tiernan was a popular name in early and medieval Ireland and was borne by several kings and saints. It is currently high on the list in Northern Ireland.

Tiernan

Irish spelling of Eva or Ava, also spelt Eabha in Ireland.

Éabha

This name, which is rising for baby girls in Ireland, looks very like the Irish word for swan, eala ("AL-la"), but the accent on the É changes the pronunciation to "EH-la". Instead, it's likely to be a gaelicized spelling of Ayla, which is popular internationally.

Éala

gabhart's list "Popular in Ireland" of 43 great name ideas: Ailbhe - Éala!