A classic in its native Scandinavia, Axel has a cool rock 'n' roll flavor in the US, thanks to Guns N' Roses' Axl Rose (born William). With its distinctive letter 'x', it has an effortlessly cool vibe about it, and is currently growing in popularity.
 
Axel is the Scandinavian form of the Biblical Absalom, who was a son of King David, and is the name of the title character of William Faulkner's Absalom, Absalom. More wearable than its derivation, perhaps, Axel is currently ranks in the Top 100 names for boys in the US, the UK, Sweden, France, Spain, and Norway. 
 In the US, it first entered the popularity charts in 1989, one year after the release of one of Guns N' Roses biggest hits, showing just how influential popular culture can can be.
 More recently, Axel was chosen by Will Ferrell for his third son, and also by Rob McElhenney and Kaitlin Olson for their boys, and it's the middle name of Tiger Woods' boy Charlie. Axel Foley was the character played by Eddie Murphy in the Beverly Hills Cop movies and, going further back again, was the name of an important character in Jules Verne's Journey to the Center of the Earth. 
 
A bit like a updated Alex, Axel was given to 4500 babies in the US in 2023, so if it was an undiscovered gem you were after, you could consider Absalom itself, or perhaps another Scandinavian option, such as Anker, Konrad, Torfinn, or Torkell.

Axel

Axis

Drop the C and arrive at an established biblical name. 

Cable

Chase, with its sleek and ultraprosperous aura, is redolent of the worlds of high finance and international banking. Chase has been well used during the last few decades, seen as a character on 24 and on several young-audience shows. 
 There are a disproportionate number of football stars name Chase.

Chase

Even among the range of blue names on the current baby naming palette -- Blue itself, Azure, Cerulean, Teal, Aqua, Cyan, Indigo -- Cobalt remains the most unusual, not to mention the most masculine.

Cobalt

This elegant surname has great potential to turn into an unusual first name, especially with its literary associations to both Stephen and Hart Crane.
 Crane is a surname that originated for a tall man with long, thin legs. It can now be seen as one of the newly stylish bird names, like Wren and Lark, and could fit in well with future classmates Zane, Kane, Dane, Lane, Rain--and Jane.

Crane

Cirrus

Coin

Gage was part of the craze for one-syllable surnames, with associations to tasty green gage plums and the mathematical gauge. 
 Gage was first noticed as a character in Stephen King's Pet Semetary--though Gage Creed was far from an admirable role model. That book was published in 1983, and the movie came out in 1989, the very year that Gage hit the Top 1000. 
 Gage has spawned a couple of successful spelling variations, so don't be surprised to run into a Gaige or a Gauge.

Gage

An appealing Hawaiian name which belongs to a town, river and bay on Kauaʻi island in Hawaii. The two possible meanings of the name, "crescent bay" or "garland (lei) valley" both describe the beauty of the place.
 
Hanalei is a unisex name which is sometimes used for boys as a Hawaiian version of Henry, although the names are not etymologically related.

Hanalei

Iris has so much going for it. It's a fashionable flower name. It's a mythological name, from the Greek goddess of the rainbow. And it's a classic name, always ranking in the girls' Top 1000 but now at its highest point ever.
 
Iris is directly derived from the Greek word iris, meaning "rainbow." In Greek mythology, rainbow goddess Iris was a messenger for Zeus and Hera who rode the rainbow as a multicolored bridge from heaven to earth. 
 The botanical iris also carries evocative symbols. In ancient times, the Iris was considered a symbol of power and majesty, the three petal segments representing faith, wisdom and valor. This image led to the naming of the colored part of the eye.
In the contemporary world, Iris has amazing international versatility, ranking highly throughout the English-speaking world as well as in a diverse range of countries from Spain to Slovenia, France to Sweden.
 Part of Iris's rise is due to its celebrity power: Jude Law and Sadie Frost, Judd Apatow and Leslie Mann, and Renee O'Connor all chose Iris for their daughters.
 A notable modern bearer was the prolific British novelist Iris Murdoch. Frequently seen on screen, characters called Iris have been played by Jodie Foster, Jane Fonda and Kate Winslet, and Iris Chase is the narrator in the Margaret Atwood novel The Blind Assassin.

Iris

Short, sharp, and cool, Jett is a contemporary choice that connotes both gemstones and jet engines. Rarely used before the 90s, John Travolta, and then George Lucas, helped to put the name on the map by choosing it for their sons. 
 
Jett is a word name with a twist, a bit like Forrest or Merritt and that extra "T" moving it more firmly into name territory. It is associated with the highly, polished black gemstone and the color "jet black", meaning it fits in with the likes of Jasper, Onyx, Scarlett, and Jade. It is also associated with jet engines, jet planes, and speed and it was this connection that likely drew aviation enthusiast Travolta to the name - though it could work for someone wanting to honor their love for travel too.
 
For those wanting a less wordy association, you could link Jett to the surname Jetson, which is a diminutive of Jordan, via the old pet forms Jutt and Jud. 
 
Jett first entered the US Top 1000 in 1999 and climbed steadily until 2009 when it was one of the fastest rising names of the year. Since then it has returned to travelling steadily upwards, and is now in the Top 300. Given to over 1700 babies every year, it is also moving up the charts in the UK.

Jett

Marvel

Mirage

This simple, elegant name offers something for many kinds of parents, from writers and history buffs to photographers to Pennsylvania dwellers. Most famous bearers are comedian Penn Jillette and Gossip Girl hottie Penn Badgley, both of whom were given this distinctive name at birth. Long obscure, Penn seems destined for greater usage.
 More familiar as a surname, Penn has had a number of distinguished bearers, including Pennsylvania founder William, director Arthur, photographer Irving, and actor/activist Sean.

Penn

Like Peggy and Patsy, the kind of zesty moniker young Judy Garland would sport in her early let's-put-on-a-show flicks. It fell out of favor (and the Top 1000) for a while, but has recently rebounded by reentering the charts in 2013. Expect it to continue gaining traction as a result of surprise hit Penelope.

Penny

Press

Patch

Pixel

Has the offbeat quality and macho feel -- like Stone and Flint -- that appeals to increasing numbers of modern parents. 

Quarry

Ridge may be the quintessential daytime drama name, but it's still better than most. This is one word name rising rapidly through the ranks, reentering the US Top 1000 in 2015 for the first time since 1989.

Ridge

Even less subtle than Duke or Earl, this name shot up the popularity charts in 2013, the same year young Prince George was born and the craze for all things royal (and Royal) began. Today, it's a leading boys' name on Nameberry's own popularity charts.

While Royal ranks on the US Top 1000 list for both girls and boys, It's rising precipitously for boys but softening for girls. There are currently nearly three times as many boy babies named Royal as girls..

Pop culture references: the hit Lorde song "Royals.", the Wes Anderson film The Royal Tenenbaums (in which the paterfamilias was named Royal), and most recently, the Amazon Prime series Outer Range, a supernatural neo-Western starring Josh Brolin as Royal Abbott.

The name's resemblance to the more classic Roy doesn't hurt either.

Royal

Zero has been documented as a given name before, but it's largely familiar as a stage name (such as Zero Mostel, born Samuel Joel Mostel) and comic book and anime characters.

Zero

Extreme cool possibilities in either of these modern categories, like a postmodern Linc. 

Zinc

puppettear's list "Names after Objects" of 24 great name ideas: Axel - Zinc!

Names after Objects

Names after common objects are simple and short, and can usually be found in a number of futuristic novels.