Billie is a tomboy nickname name, part of the growing trend for using boyish nicknames for girls and now destined for stardom along with its most famous contemporary bearer, music sensation Billie Eilish.
 To track its path from blue to pink, Billie was 100% male in 1880, was 55% female just a decade later, in the girls' Top 100 by 1928, and is now overwhelmingly female.
 Billie is a possible retro choice for fans of jazz great Billie Holiday, born Eleanora, and a very contemporary choice for teen singer Billie Eilish -- born Billie Eilish Pirate Baird O'Connell. Other conceivable namesakes are The Wizard of Oz's Glinda--Billie Burke (born Mary William), silent screen star Billie Dove (born Bertha), actresses Billie Whitelaw and Billie Piper (born Lianne) and tennis legend Billie Jean King (born Billie). Another cultural reference is the Michael Jackson hit song 'Billie Jean.'
 Billie was picked for their daughters by Carrie Fisher, My Name is Earl actor Ethan Suplee, and Rebecca Gayheart and Eric Dane.

Billie

Different origin from the Welsh Dylan, but increasingly used as a variant spelling to honor Bob Dylan or Dylan Thomas. Still, the Dylan spelling is found 20 times as often as Dillon.

Dillon

Dylan still feels poetic and romantic after years of popularity. It still ranks highly on the charts, among the top <a href="https://nameberry.com/search/boys-names/d">boy names starting with D</a>, so if you choose it, be aware that yours may not be the only Dylan in his class. 
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Dylan was derived of the Welsh components dy and llanw, meaning "sea." In Welsh mythology, Dylan was a legendary sea god who prompted all the waters of Britain and Ireland to weep when he died. The name came to prominence via the great Welsh poet Dylan Thomas, whose name Bob Dylan adopted in tribute.
 >Several celebrities have sons named Dylan, including Welsh-born Catherine Zeta Jones and Michael Douglas, Kenneth 'Babyface' Edmonds and Nadia Comaneci.
 The name Dylan was given to about 500 baby girls last year, but 6700 baby boys so it doesn't quite qualify as unisex. 
 Dillon is another popular spelling, though the Dillon spelling is used only about 5 percent of the time.

Dylan

Dill

Dillie

Emerald is the intriguing color and jewel name of the deep green stone treasured as far back as ancient Egypt — it's supposed to open one's heart to wisdom and to love and be good for strengthening relationships — which could make for an interesting, unusual name, particularly with the popularity of so many Em-starting names. 
 Emerald is the birthstone of May, making it extra appropriate for a girl born in that month. Some pleasant associations: the Emerald Isle and the Emerald City.
 Esmeralda is the Spanish version.

Emerald

Pronounced like Owen, this was the name of several early Irish kings and saints, as well as a celebrated Ulster hero. Often spelled with two 'n's in Scotland, it has been Anglicized as Ewan, Ewen, Euan, Owen, Hugh, or Eugene.

Eoghan

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

Evangeline is a romantic old name enjoying a major comeback, thanks to its religious overtones, Eva's popularity, and the star of the TV megahit Lost, Evangeline Lilly. Evangelia and Evangelina — two variants of Evangeline — are sure to tag along for the ride.

 Evangeline was introduced to the English-speaking world by Longfellow in his hugely popular eponymous narrative poem, and can also be found in Uncle Tom's Cabin (it was Little Eva's full name), as well as two novels by Evelyn Waugh. More recently, there were Evangelines in the films Nanny McPhee and Disney's The Princess and the Frog.

Evangeline

Could Hal be the Jack, Max, or Gus of the future? It just might happen in the new nickname environment. Hank Azaria put it on his son's birth certificate.
 Hal is a venerable nickname for Henry, Harry and Harold, famously used by Shakespeare in King Henry IV as the name of the king's son, the future Henry V.
 A number of show biz figures of a certain era have gone by the name, including Hals Roach, Wallis, Ashby, Holbrook, David and Linden. In the eponymous film, Jack Black played "Shallow Hal."
 As for the bad-guy machine in "2001: A Space Odyssey," that HAL stood for Heuristically programmed ALgorithmic computer.

Another culture's take on the Hailey/Halle phenomenon. 

Hali

Like others in this vein, problematic due to the feminine Hailey connection. 

Harrison, a name made viable by Harrison Ford, is increasingly popular with parents who want an H name that's more formal than Harry or Hank but doesn't veer into the stiff Huntington-Harrington territory. 
 As a surname, Harrison has both Beatle and presidential connections. Harrison was the surname of two presidents, William Henry Harrison, who died 31 days after taking office, and Benjamin Harrison, whose election in 1888 sparked Harrison's peak as a first name.
The Duke and Duchess of Sussex, aka Prince Harry and Meghan, used Harrison as a patronymic middle name for their son, Prince Archie.

Harrison

Harry is the medieval English form of Henry, which derived from the Germanic name Heimrich, meaning "estate ruler." Harry was the nickname of all eight King Henrys; it is also a diminutive of Harold and Harrison.
 
We're just wild about Harry! Harry was everyone's elderly uncle until Princess Diana, following British royal tradition, named her son Henry but called him Harry. Then Harry Potter became a rage and Harry Styles of One Direction became the hottest boy bander of the new millennium. Thus, Harry's avuncular image was history. Harry is still much more popular in England, Ireland, and Scotland than it is in the US, but its classic yet unpretentious image makes it a recommended choice.
 
Harry was a Top 20 name in the US from 1880 to 1918, and continued in the Top 100 into the 1950s (hence the song "I'm Just Wild About Harry"), and has countless worthy namesakes, including Truman, Belafonte, and Houdini.
 
Among the celebs who have chosen this good guy name for their sons are David Letterman (it was his father's name), Simon Baker, and Billy Bob Thornton. It's also found in a number of movie titles from The Trouble with Harry to Dirty Harry to When Harry Met Sally.

Harry

Henry is back. The classic Henry climbed back onto the Top 10 in the US in 2021 for the first time in over a century, and now stands at Number 7.
 Like James and Theodore, Henry is a traditional name that also manages to feel stylish. Despite its popularity, it's not for everyone, but in some upscale American suburbs, it can seem as if every other little boy is named Henry or Theo or Jack.
 Henry was derived from the French Henri, which ultimately comes from the Germanic name Heimrich, made up of the components heim, meaning "home" or "estate," and rich, meaning "ruler." The most famous bearer is Henry VIII of England, best known for having six wives—two of whom he beheaded for not bearing him sons. It’s been used in the British royal family many times since, including for the current prince better known as Harry.
 
Other illustrious Henrys that might provide baby name inspiration include Henry David Thoreau, Henry (Hank) Aaron, Henry James, Henry Ford and Henry Miller.
 Numerous celebs have chosen Henry for their sons, from Julia Roberts to Minnie Driver to Heidi Klum to Colin Farrell.
 Appealing international versions include Arrigo, Enrico, Enzio and Enrique.

Henry

Lochlan and Lachlan are running neck and neck and both rising into the Top 1000. Which spelling you use is purely a matter of taste.

Lochlan

Lorcan is a name rich in Irish history as belonging to several kings, including the grandfather of the most famous high king of Ireland, Brian Boru. Lorcan O'Toole, known in English as Laurence O'Toole, is the patron saint of Dublin, so it's not too surprising that Irish-born actor Peter O'Toole named his son Lorcan.
 In the Harry Potter epic, Lorcan is the twin son of Luna Lovegood Scamander.
 Strong, easy to pronounce and spell, Lorcan is an Irish name that would stand out from the more common crop of Connors and Liams.

Lorcan

Loughlin

Owen, a resonant Celtic name, has ranked among the Top 100 boys' names in the US for 20 years and is now at its highest point ever.
 
Why do so many parents love Owen? It's a classic with a genuine history, yet it's right in step with the modern trend for two-syllable, n-ending boys' names. Owen-like choices with less tradition behind them include Logan, Bowen, and Rowan.
 Owen is derived from two names—the Welsh Owain and the Celtic Eoghan. Each are connected to Eugene, which ultimately came from the Greek word eugenes, comprised of the elements eu, meaning good, and genes, "born." 
 
Owen became a Welsh patronymic surname during the Renaissance. The legendary St. Owen was a Benedictine monk who was a follower of St. Chad.
 
In Ireland, Owen may be spelled Eoin, as in Irish writer Eoin Colfer, and Eoghan. Other similar names include the Scottish Ewan or Euan and the French Ouen.
 
Owen's popularity now extends beyond English-speaking countries to France, Belgium, and the Netherlands.

Owen

Though Tate is used almost exclusively for boys, we can see Tate as a stronger surname alternative to Kate or a clipped form of Tatum. 

Tate

A strong single-syllable surname with a joyful meaning, Tate is finding a place on more and more birth certificates.
 Former Spice Girl Emma Bunton named her second son Tate Lee.
 Tate also has a cultural vibe via the Tate and Tate Modern museums in London, named for philanthropist Henry Tate. Actor Tate Donovan is a prominent current bearer.

Tatum is strong, distinctive, energetic, and recommended, especially if your last name is as congenial as O'Neal. The name is now used for both genders, with the balance running about two to one in favor of the girls.
 Though this surname became a first in the nineteenth century, it didn't become a ranked American girls' name until 1994, two decades after Tatum O'Neal won her Best Supporting Oscar at the age of ten. It seems to be on a slight downward trend, having fallen out of the Top 400 in 2015 for the first time since 2002.
 Rose McGowan played a Tatum in the movie Scream. As a surname, Tatum is now strongly associated with popular actor Channing; in the past it was jazz pianist Art.

Tatum

grantairebear's list "This Month's Competitors" of 22 great name ideas: Billie - Tatum!