Newly fashioned but familiar and with an on trend, unisex feel, Addison seems like the perfect solution for anyone who can’t decide between Madison, Adeline, and Alison. 
Addison really took off in the mid-2000’s, making a spectacular jump from being outside the Top 100, to being nearly within the Top 10, just two years later. Undoubtedly influenced by the introduction of Dr. Addison Shephard to “Grey’s Anatomy”, the name was at its peak in 2009. 
While it’s been steadily falling back down the charts, it does remain a popular choice. Currently given to nearly 4000 girls in the US each year, it ranks highly in New Zealand and Canada too. In the UK, it has made significant gains, becoming familiar for girls – and for boys too. 
Borrowed from an English surname, meaning “son of Adam,” Addison joined Madison as one of the few “son of” names to be used almost exclusively on girls. It also joins the 17 strong crowd of “Ad- names” in the charts for girls, including Adeline, Adelyn, and Adelaide. 
Contemporary and cool with a cute, sassy nickname, Addison has been a popular choice for celebrities. Baseball player Jason Bay, TV personality DeAnna Papas Stagliano, NASCAR driver Sam Hornish Jr, and Joe and Kendra Duggar all have daughters called Addison. 
It is unclear if Addison will fall as fast as it rose, but for now it remains comfortably within the Top 100. So, if love Addison but want your choice to stand out, you could try: Sullivan “Sunny”; Halliday “Hallie”; Barrett “Betty”; or Alcott “Lottie.”

Addison

Aiden in all its spelling variations is the Anglicized version of the Irish Aodhán, which was originally a pet form of the Irish name Aodh (pronounced 'ee'), who was the old Celtic god of the sun and fire. St. Aidan was a famous seventh century Irish saint, noted for his kindness and generosity and for spreading Christianity.
 
Aiden has been a spectacular name success story—especially if you add all its various spellings together. Counted together, Aiden in all its versions is still a Top 10 boys' name.
 
The Aiden spelling has become the predominant version of the name in the US, followed by Ayden -- and then, in order of popularity, Aidan, Adan, Aden, Aydin, Aydan, Eiden, Aidyn, Eydan, Eyden, Adin, Aedan, and Aiyden. And then there's a pack of popular rhyming offshoots such as Brayden and Kaden.
 
Irish actor Aidan Quinn introduced the name to the US. The Aiden spelling was used by actress Tracey Gold and Rod Stewart for their sons.

Aiden

Amelia is one of the hottest <a href="https://nameberry.com/girls-names">girls' names</a>, a successor to the megapopular Emma and Emily. Amelia, which spent several years at Number 1 in England, vaulted into the US Top 10 in 2017 and continues to rise.
 
Now the most popular <a href="https://nameberry.com/search/girls-names/a">girl name starting with A</a>, Amelia is also a Top 10 girls' name in Australia, Ireland, New Zealand, Scotland and Poland. So while Emilia and Emelia are sound-alike names, it's the Amelia version that's on the fast track. 
 
Amelia is derived from the German name Amalia, which in turn is a variation of Amalberga. The root, amal, is a Germanic word meaning "work," and in the context of female given names suggests themes of fertility as well as productivity. Aemilia, the name from which Emily is derived, is unrelated to Amelia.
 
Kids might associate Amelia with the wacky children's book character Amelia Bedelia, while adults could appreciate it as the eponymous heroine of the Henry Fielding novel. Amelia also appears in novels by Trollope and Thackeray, as a Harry Potter name, and as detective Amelia Peabody in the Elizabeth Peters series. Angelina Jolie played patrol cop Amelia Donaghy in The Bone Collector.
 
Amelia became a British royal name via the daughters of Kings George II and III. American heroes who have inspired a new generation of namesakes are aviatrix Amelia Earhart and feminist Amelia Bloomer.
 
Trivia tidbit: Amelia is the birth name of Minnie Driver.

Amelia

The Irish name given to Miranda Hobbes's son on the dearly departed Sex and the City is a friendly and energetic choice. You well might want to make your son part of the Brady bunch. 
 Brady has been a well used <a href="https://nameberry.com/boys-names">boys' name</a> since the turn-of-the-last-century Diamond Jim Brady days.
 Brady Fuller is a young werewolf in the Twilight" series, but there were more notable Bradys bearing it as a surname, including Civil War photographer Mathew, press secretary James, and quarterback Tom--in addition of course to Mike, Carol, Greg, Marsha, and Jan et al.

Brady

Bristol Palin, the daughter of former Alaska governor and Vice Presidential candidate Sarah Palin, grabbed her own share of headlines by having a baby out of wedlock and then appearing on Dancing With The Stars. She single-handedly propelled her distinctive name, inspired by a city in England, into the Top 1000 and up the charts. Bristol's ascent ended a few years back.

Bristol

Britton, technically a spelling variation of Britain, is much more popular that the original place name for both boys and girls. There are about three baby girls named Britton for every four boys, making it a truly nonbinary choice.

Britton

The energetic Brody is a name that claims different meanings and origins depending on whether you're looking at its Irish, Scottish, or English history -- and Eastern Europeans claim a version too. An alternate spelling is Brodie.
 Caitlyn Jenner named her son Brody before she fell under the sway of the Kardashian K-naming klan, and volleyball ace Gabrielle Reese used the name for her daughter. The Brody on TV's Homeland is known by his surname; his first name is Nicholas.

Brody

This surname has a modern yet old New England feel, perhaps because of the association with the transcendental teacher and reformer Bronson (born Amos Bronson) Alcott, father of Louisa May. (One-time sitcom star Bronson Pinchot's full name is Bronson Alcott Pinchot.)  A more muscular image comes via tough guy Charles Bronson.

Bronson

Bereich

Berkeley

Brockamp

Brynnlie

Carter has ranked in the Top 100 since the the turn of the millennium, but despite its recent popularity, it's not a trendy new name. In fact, Carter is one of those names that just misses ranking in the US Top 1000 for its entire 140+ year history. 
 
Carter's off its recent popularity peak now, but it's getting some fresh style via Beyonce's country album Cowboy Carter, which references the surname of her husband Jay-Z aka Shawn Carter.
 
Having hot characters named Carter on both Gossip Girl and The OC probably didn't hurt Carter's rise, along with Noah Wyle's Dr. John Carter on ER, who was always called by his last name. Carter also, of course, has presidential cred.
 Carter is especially popular in the Midwest, having recently been Number 2 in Nebraska and Number 3 in Iowa, as well as spreading north to Canadian provinces Saskatchewan (recently Number 2) and Manitoba (recently Number 5). It does straddle the line between country and city, another reason for its longtime appeal.

Carter

One of the surname names for boys on its way to becoming unisex, this name broke into the Top 1000 for the first time in 2013 for girls. While it sounds masculine to us, because of its two-syllable er-ending sound so trendy with <a href="https://nameberry.com/boys-names">boys’ names</a>, many parents apparently disagree.

The genial yet upscale and preppy Cooper was one of the first occupational last names to catch on -- and Cooper remains a pleasing option.
 Cooper began his rapid climb in 1982 and is a popular choice for baby boys. It is wildly popular in Australia, where in some areas Cooper is the top name.
 Two surnamed Coopers currently shining a spotlight on the name: Anderson and Bradley. Parents of Coopers include Melissa Rivers and Dylan Lauren.
 One caveat: Cooper is an extremely popular dog name.

Cooper

The Dorians were an ancient Greek tribe, one of the three major pre-Spartan tribes. It literally means "of Doris," a Greek district, or "of Doros," referring to the son of Helen of Sparta. Dorian derives from the Greek doron, meaning "gift," along with related names such as Dorothy and Dora.
 
Dorian was introduced as a first name by Oscar Wilde in his 1890 novel, The Picture of Dorian Gray, the story of a narcissistic character who retains his youthful good looks while his portrait in the attic ages grotesquely. Despite this negative reference, Dorian's attributes have kept it consistently on the boys' list since the 1960s.
 Dorian also has a musical reference, being the name of one of the modes.
 Actor Dorian Harewood has been a familiar presence in movies and on TV.
 Rhythmic and unusual, Dorian makes a distinctive choice.

Dorian

An Emily or Emma substitute that may be prettier and more classic as Emmeline or Emeline.

Emlyn

Honest and sincere, laid-back and creative, Emmet is a male cognate of the megapopular Emma and Emily, but the more common spelling is Emmett. Emmet dropped off the US Top 1000 in 1934 and reentered the list in 2014; Emmett, on the other hand, has never been off the charts.

Emmet

Gabriel has become a biblical favorite, an angelic choice that's lighter and less patriarchal than some of his Old Testament brethren. Derived from the Hebrew name Gavri’el, Gabriel is taken from the elements gever, meaning "strong," and ’el, in reference to God.
 
In Abrahamic religions, Gabriel is the archangel who heralded the news of Jesus' birth, and appears in Christian, Jewish and Muslim texts. He presides over Paradise, serving as the angel of mercy, life, joy, judgment, truth and dreams. 
 In addition to all his other responsibilities, Gabriel is the patron saint of broadcasters and diplomats, and he governs Mondays and the month of January, making Gabriel one of the top <a href="https://nameberry.com/list/629/71-wonderful-names-for-january-babies">January baby names</a>. 
 
Gabriel has proven itself a friendly and appealing alternative to Michael, that other, long-reigning archangel. Gabriel enjoys remarkable international popularity, ranking in the Top 100 in countries as diverse as Israel and Iceland, Chile and Croatia. It is currently the Number 1 boys' name in France.
 Parents of Gabriels of varying ages include Mick Jagger and Jerry Hall, Daniel Day-Lewis and Isabelle Adjani, Jason Alexander, Meredith Vieira, and Mia Farrow.

Gabriel

Grayson, which you might think of as a Jason-Mason substitute, has been rising through the US Top 1000 since 1984 and has ranked in the Top 100 since 2011. 

That makes Grayson a modern classic boys' name, with both a sober buttoned-up feel as well as an unconventional masculine vibe. Grayson might plausibly be a banker or an artist, and its resemblance to its female counterpart Grace gives it a feminist gloss.
 
Grayson's biggest problem, if you consider it one, is its persistent, widespread popularity. The Greyson spelling also ranks highly in the US and throughout the English-speaking world, and a wide range of alternative spellings including Gracen, Gracyn, and Greysun have sprung up for baby girls and boys.
 
Last year, about 11,000 baby boys in the US were named Grayson and Greyson alone, as many s were named William or Henry, making it a solidly Top 10 name.

Grayson

Hadley, most famous as the name of Ernest Hemingway's first wife, is more sophisticated, professional, and modern than cousins Harley, Haley, or Hayden. 

The hit book The Paris Wife, a novel by Paula McLain told from the point of view of Hadley Hemingway (born Elizabeth Hadley Richardson), has helped popularize the name, which also appears on the vampire show True Blood. Hadley could become this generation's Hailey.

Adley, a mashup of Hadley and Addie, has also appeared on the scene.

Hadley

Hanalei

Jack may have fallen from its Number 1 place in England, but in the US it's as popular as it was at its height in the 1920s and 1930s. A durable, cheery, everyman form of John, Jack ranks as one of the most popular <a href="https://nameberry.com/search/boys-names/j">boy names starting with J</a>. 
Jack is a derivative of John that originated in medieval England. The name went from John to Johnkin to Jankin to Jackin to Jack. The name was so common in the Middle Ages that Jack became a generic term for a man. 
 
Jack is familiar to all from earliest childhood via Jack and Jill, Jack Sprat, Jack and the Beanstalk and Little Jack Horner et al. It is still a recent favorite for novel, TV and movie characters. 
 
Jack is at the top of the charts in Ireland and Scotland, and also ranks highly in Germany, Sweden, the Netherlands, and Belgium.
 
The jaunty Scottish version is Jock.

Jack

Jasper originated as a variation of the Latin Gaspar, which ultimately derived from the Persian word ganzabara, meaning "bringer of treasure." As a given name, Jasper’s etymology is unrelated to that of the gemstone, which comes from a Semitic word meaning "speckled stone." Jasper is the usual English form for one of the Three Wise Men who brought gifts to the infant Christ according to medieval tradition and appears in the Bible as a reference to the stone itself in Revelations 4:3.
 
Jasper has a lot going for it—it's been rocketing up the ranks in the US, after long being considered a posh and charming name in England. Distinctly masculine, Jasper represents a variety of quartz—one of the few gem <a href="https://nameberry.com/boys-names">names for boys</a>—and is the first name of the great modern artist Jasper Johns. Our only caveat: Jasper is a favorite of a lot of hip parents, and has gotten even more popular since its strong appearance in the Twilight books and movies.
 Jasper has considerable literary cred as well, appearing in works by Sir Walter Scott, James Fenimore Cooper, Thackeray, and Thomas Hardy--as well as Stephenie Meyer. 
 Casper/Caspar is the German version.

Jasper

Jonah, the name of the Old Testament prophet who was swallowed by the whale, only to emerge unharmed three days later, is increasingly appreciated by parents looking for a biblical name less common than Jacob or Joshua, yet not too obscure. Plus, Jonah comes with a ready-made nursery-decorating motif.
 The appealing Jonah has been featured in such movies as Sleepless in Seattle and Knocked Up and is currently represented by actor/writer Jonah Hill.
 Jonas is the Greek version and Yona is a female spin.

Jonah

Kassie

Popular pop name, inspired by Australian singer Kylie Minogue. It was at its height in Australia in the 1970s and early 80s; often cited as a Noongar name meaning "boomerang". 

 Kylie has also been used as a feminine form of the Scottish name Kyle. The youngest Kardashian sister, Kylie Jenner, is undoubtedly keeping its style going.

Kylie

Kylan

Luke is a cool-yet-strong Biblical name with a relaxed cowboy feel, which has been on the rise since the advent of Luke Skywalker.
 
Today, the Luke constellation of names is more popular than ever, with the ascendance of Top 10 Lucas and international star Luca. Luke ranks third in the group, but still stands in the US Top 50 and the Top 100 throughout the English-speaking world.
 
Luke originated as a short form of Lucas, a Latin derivation of the Greek name Loukas. The most famous bearer of the name is the first-century Greek physician—an evangelist and friend of Saint Paul, as well as the author of the third Gospel of the New Testament—who was also supposed to have been a portrait painter. He thus became the patron saint of doctors and artists.
 
Later Lukes have included Luke Duke of The Dukes of Hazzard, Cool Hand Luke, half of the classic soap opera duo of Luke and Laura, contemporary actors Luke Wilson and Luke Perry, and a number of star athletes.
 While Luke, Lucas, Luca, and the French Luc all have the same root and meaning, Lucius and Lucian have a different origin and meaning -- the more evocative "light".

Luke

Mason is an occupational surname that ranked among the Top 10 name for boys throughout the 2010s, after its choice as one of the first Kardashian baby names.
Part of its appeal is as a fresher-sounding replacement for dad name Jason. It's also one of the leaders of the Jackson-Hudson-Grayson-Kayson trend.
Along with Kourtney Kardashian and Scott Dissick, Mason was chosen for their sons by several other celebrities, including Cuba Gooding, Jr., Melissa Joan Hart and Kevin Richardson (as well as by Kelsey Grammer for his daughter).
And there were two cute TV werewolves named Mason: Mason Greyback on Wizards of Waverly Place and Mason Lockwood on Vampire Diaries--a far cry from the name's wholesome image.

Mason

Maddix

Maysileigh

A name that Yanks might see as overly British, but combined with the right surname, it does have a measure of Sherlock Holmesian dash via Nigel Bruce, who played the original Dr. Watson to Basil Rathbone's Sherlock Holmes. 

Nigel

Piper is a bright, musical name that entered the list in 1999, one year after the debut of the TV series Charmed, which featured a Piper, and it's been a consistent riser since. Piper Kerman is the memoirist whose prison experiences provided the basis for the hit Netflix series Orange is the New Black.
 Piper has been chosen by several celebs for their daughters, including Gillian Anderson and Cuba Gooding, Jr., and is now one of the top <a href="https://nameberry.com/search/girls-names/p">girls' names starting with P</a>.
 One of the first Pipers on the scene was Piper Laurie (born Rosetta), after whom actress Piper Perabo was named.

Piper

Paxson

Rory is a buoyant, spirited name for a redhead with Celtic roots. The name Rory is getting more popular overall, but for the past few years has been trending decidedly toward the boys' side -- however, it's been rising to new heights for girls in recent years. 
 It's worth noting, however, that while Rory is used a third of the time for girls in the US, in Britain it's never used as a girls' name. In London or Liverpool, naming your daughter Rory is like naming her....Roger.
 Rory (or Rori) might also be a nickname for Aurora. In the TV series Gilmore Girls, Rory was the nickname of Lorelai Leigh, the daughter character played by Alexis Biedel whose mother, played by Lauren Graham, was also named (and called) Lorelai.
 Robert Kennedy's youngest daughter, born after his assassination and now a respected documentary filmmaker, is named Rory. Actress Melora Hardin named her daughter Rory Melora.

Rory

This ultrapopular boys' name is rapidly becoming a hot <a href="https://nameberry.com/girls-names">name for girls</a>; admired for its buoyant Irish spirit. Ryan returned to the Top 500 for girls in 2015 and will no doubt continue to climb further on the back of the success of blockbuster film Gravity. A word of caution, however – the meaning and the movie reference may leave your daughter feeling as though you wished she were a son You may wish to go with Rion instead, which is similar in sound and means Queen in Irish. Rion is pronounced ree-on, which introduces problems of its own.

Ryan

Scout, a character nickname from To Kill a Mockingbird (her real name was Jean Louise), became a real-life possibility when Bruce Willis and Demi Moore used it for their now grown middle daughter, followed by Tom Berenger a few years later. A unisex choice that is growing in popularity for both genders -- but given to girls about four times more often than to boys -- it was picked by skater Tai Babilonia for her son and Kerri Walsh for her daughter Scout Margery.
 It makes a virtuous, upstanding choice for a girl--a good scout. And though it hasn't made it onto any popularity lists, it's gone from slightly eccentric to mainstream.

Scout

As unlikely as it may seem, Theodore is a hot new hit name, vaulting into the Top 10 in 2021 for the first time ever. Friendly nickname Theo may be responsible for some of that, though there are plenty of baby boys given Theo as their full name too. Add their numbers together, and the two names jump to Number 6.

Theodore is a derivative of the Latin Theodorus, a variation of the Greek name Theodōros. The components are from the Greek words theos, meaning "God," and dōron, meaning "gift," giving Theodore the meaning "God-given" or "gift of God." Names with similar origins include Theodora, Dorothy, and Dorothea.
 
When Theodore Roosevelt took office in 1901, the name Theodore was in the Top 40 <a href="https://nameberry.com/boys-names">boy names</a>, with Teds and Teddys everywhere. After some damaging stereotypes—the chubby Chipmunk Theodore and Beaver Cleaver's real name—Theodore went into a decline, from which it has definitely made a recovery, thanks in part to the popular and likable nickname Theo.
 Theodore has been the choice of several celebrities, including Ivanka Trump, Bryce Dallas Howard, Natascha McElhone, and Ali Larter, not to mention being the fictional son of Christian and Ana in Fifty Shades of Grey.
 The name has a distinguished history. In addition to being presidential, it was borne by novelist Dreiser, poet Roethke, and French painter Gericault, and it was the first name (spelled Theodor) of Dr. Seuss.
 Among the well-known Teds, baseball's Williams and musician Nugent were born Theodore, but Ted Turner was christened Robert, and Ted Kennedy and Ted Danson were originally Edward.
 The beloved character Laurie in Little Women was named Theodore Laurence.

Theodore

Sarah Palin and husband Todd, creative baby-namers, named their oldest son Track because of their love for running.

Track

An ancient tree that figures in literature from Shakespeare to Harry Potter and is believed to possess magical powers, Willow is a lovely name, as graceful as its inspiration.
 Willow's use as a given name derives directly from the willow tree, whose name was derived from the Old English word welig, meaning "willow." Willow trees are associated with grace and elegance, which gave way to the adjective "willowy." Other names with meanings related to willows include Arava, Willoughby, Dozier, Wellesley, Selby, and Salton.
 
This elegant and charming nature name has been chosen for their daughters by Will Smith and Jada Pinkett Smith, Michelle Monaghan and Pink. It's been a fast riser in recent years, climbing along with other Will names Willa, William and Will, having taken off here a year after the character of Willow was introduced on Buffy the Vampire Slayer in 1997.
 
Willow is also popular in other English-speaking countries: Australia and the UK, Canada, Ireland, and Scotland.
 
The name has transcended its one-time hippie aura to move into the realm of reappraised and appreciated <a href="https://nameberry.com/list/329/nature-baby-names">nature names</a>. The willow is believed by the Romani to possess the ability to heal the sick and rejuvenate the aged.
 
Pink was quoted as saying her choice was influenced by a willow tree she grew up near, and that it is the most flexible tree that nothing can break—no wind, no elements, it can bend and withstand anything.

Willow

softballblue9's list "Names for Future Kids" of 41 great name ideas: Addison - Willow!