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With mythological names rising, the handsome son of Zeus and god of medicine, music, and poetry among many other things might offer an interesting, if high-pressure, option. 
 
But if Romeo and Venus are now deemed baby-appropriate, why not Apollo? Olympic speed skater Apolo Anton Ohno might inspire some parents. And now that it's been chosen by Gwen Stefani and Gavin Rossdale, it could take off as their first son's name—Kingston—has.
 Other cool associations include NASA's Apollo program, from 1961-72, that succeeded in putting the first humans on the moon when astronauts Neil Armstrong and Buzz Aldrin landed their lunar module and walked on the moon's surface. There's also the historic Apollo Theatre in Harlem, on whose stage the careers of Billie Holiday, Ella Fitzgerald, Artetha Franklin, Stevie Wonder, the Supremes, the Jackson 5, and countless others were launched.

Apollo

Better than Capricorn or Cancer, not as usable as Leo, the name of the Roman god of war becomes more possible as a baby name every day, as mythological names take the place of biblical names. 

Aries

The name of the Aster flower, named by the English, was derived from the Greek word for star. Like many floral names, Aster is much more popular among baby girls.

Aster

More common as a dog name than a baby name for now, but that hasn't stopped Milo and Rex rising back up the charts! Lovers of edgy o-ending names like Otto, Arlo and Cosmo might like this starry-eyed possibility.

Astro

Atlas is one of those names that was previously thought too powerful for a baby boy, who would have to be strong enough to carry the world on his shoulders. Now Atlas has joined the pantheon of Greek and Roman god and goddess names in the realm of possibility, along with Mars, Zeus and Apollo.

 Atlas was one of the fast-rising names on the list in recent years in the USA, jumping from oblivion in 2012 into the Top 500 in 2015, and climbing several hundred places higher since then. Anne Heche was one of the first to make this audacious choice, but several celebrity parents have followed suit.

 As well as the mythological connection, Atlas is a cool geographical word name – perfect for the child of parents who love traveling or who hail from different parts of the globe.

Atlas

Aether

In Roman mythology, Caelus was the god of the sky prior to Jupiter. It's one of the few names that's virtually one-of-a-kind yet fits in with current stylish choices such as Caius and Callum (neither of which Caelus is etymologically related to).

Caelus

Although now almost exclusively feminine in the English-speaking world, Celeste (or Céleste in France) is traditionally a unisex name in Italy and France. It Italy, it was more popular for males until around the middle of the 20th century.

Celeste

We all heard it on Seinfeld as the long-concealed first name of Kramer, then considered a punchline. Now some pioneering parents are embracing this expansive Greek name, which makes a creative and cool choice for a baby. Influential celebrity couple Scarlett Johansson and Colin Jost chose it for their son, born in 2021, which will likely drive Cosmo up in popularity. In the UK, it currently ranks within the Top 1000 boy names and is trending upwards.

 In literature, Baron Cosmo Bradwardine is a character in Sir Walter Scott's novel Waverly and Cosmo Topper is the befuddled banker in Thorne Smith's humorous novel Topper. In modern times Cosmo has become the short form for Cosmopolitan – both the magazine and the cocktail. And for those wishing to honor a medic in the family, Cosmo is also the name of the Arabian-born patron saint of doctors.

Cosmo

Cygnus is a northern constellation of the Milky Way, derived from the Latin word for "swan".

Cygnus

Callisto

Cygni

Dust

An evocative word name denoting a rare celestial phenomenon when the sun and moon are aligned so that the moon casts a shadow over the Earth (a solar eclipse), or when the moon is right in front of the sun, showing only a ring of light (a lunar eclipse).

Eclipse

Elio is a sunny and spirited Italian and Spanish name that makes a great crossover prospect, which could catch on as Enzo has. Elio is also currently popular in France, ranking in the Top 250.

Elio

In Greek mythology, Eris was the goddess of strife and discord. It's also a planetary name — that of the second-largest dwarf planet in the Solar System.

Eris

Esther

More familiar to English speakers in the Italian Elio form. 

Helio

Hydra

Infinite

Illumin

Aviation enthusiast John Travolta put this fast-paced name in the lexicon when he used it for his late son, and George Lucas followed suit. 

Jett might be a word name for a kind of airplane or for the mineraloid jet, typically black and shiny, giving rise to the term "jet black".

Jett

Juno

Jupiter's partner Juno has entered the mainstream, so it's possible that her divine mate could follow. But not necessarily for boys — Jupiter is currently mostly female in the US, thanks to its similarity to Juniper. Stars including Ed Sheeran and Ashley Tisdale recently welcomed daughters named Jupiter, which could shift the balance even more towards the girls.
 
The name of the supreme Roman deity and the largest planet has until recently had either too hippie or too grandiose a feel for most mortals, but with the rise of sound-alike Juniper and space names such as Orion and Mars, Jupiter may find new favor.
 
Short form Jupe is adorable.
 
More background on that deity: Jupiter was the king of the Roman gods, and god of the sky, the equivalent of Greek Zeus. His name may have originated as a title. It can be interpreted to mean "father of the sky" or "father of the gods" (dyew-peter > iou piter > iuppiter (the form of the name used in Latin) > Jupiter). With Juno and Minerva, he made the Capitoline triad, whose worship was at the very centre of Roman religion.

Jupiter

Lux, one of the light-filled names that include Lucy and Lucian, broke onto the scene as a girls' name but now it's decidedly gender neutral. In fact, at the last count there were slightly more boys named Lux than girls: 140 to 120. But that's pretty close, making this a truly nonbinary name.

Lacuna

Lunar

The name of the Roman god of war began to sound less intimidating when Erykah Badu gave it to her daughter, and musicians Thomas and Bruno Mars (the latter born Peter Hernandez) have given it a modern edge. Mars actually could make a pleasant, planetary middle name for either sex.
In Roman mythology, Mars was the god of not just war, but also agriculture, and was more down-to-earth and less cold and ruthless than his Greek counterpart Ares. He was considered a father of Rome, as he was the father of mythical founder Romulus.

Mars

Meno

Moon

An ubercool and mysterious name, brought to you by director M. Night Shyamalan. 

Night

Variant spelling of Nyx, the name of the Greek goddess of the night. It also coincides with the English word "nix, a corruption of German nichts "nothing". Nix would fit right in with names like Knox, Rex, Pax and Max.

Nyx is the name of the Greek goddess of the night. It's used for baby boys in small numbers.

Nott

Nuit

Ophiuchus

Pheonix

Ratri

If you've rejected all the names on earth, you might move on to the sixth planet from the sun, also the Roman god of agriculture and plenty, and the origin of Saturday.

Saturn

Scorpius is the constellation that the Scorpio zodiac sign originates from. It was given its venomous name due to the constellation's resemblance to a scorpion's tail. 

Scorpius

Yes, it's the name of the brightest star in the sky, but can't you just hear people saying, "Are you serious?" Singer Erykah Badu used it as a middle name for son Seven. 

Sirius

Sky is an ambigender nature name that was first legitimized as the character of Sky Masterson in the 1950 musical Guys and Dolls, played in the film version by Marlon Brando. It's a name we appreciate for its clear, wide-open feel, less hippyish than others like Rainbow and Starlight, and makes an appealing middle name possibility.
 Sky is the name of Sophie's fiance in Mamma Mia, and there are both Power Rangers and Transformers with the name. Elizabeth Berkley used it for her son.
 It is also spelled Skye, as in the island in the Inner Hebrides of Scotland. Plus, it's a logical nickname for the variously spelled Schuylers and Skylers.

Although pinochle-playing partner Sam came out of retirement, we don't see it happening to Sol. Near soundalike Saul has more of a shot.
Sol was also a Roman god/personification of the sun, and an epithet of sun-god Apollo.

Windswept and dramatic, but perhaps asking for trouble. Quite popular in Denmark and Sweden, where it derives from Stromr, which is a fairly common surname. Storm Thorgerson is a famous bearer of the name - he designed iconic album covers for Led Zeppelin, Black Sabbath, the Cranberries, Anthrax, and Pink Floyd.

Storm

A simple and appealing unisex Korean name with many possible meanings, depending on the hanja characters used. This spelling also coincides with the English word "sun", which is a nice bonus.
 
Ray Orbison Jr. has a son named Sun Jakob. On the inspiration for the name, he stated, "We want Sun to know his family’s story; his name is inspired by the legendary Sun Records where rock and roll was born with his grandfather Roy Orbison, Elvis, Jerry Lee Lewis, Carl Perkins and Johnny Cash. He’s our little sunshine."

Graceful Indian choice that may sound feminine to the Western ear but is in fact the name of a male god.  One form of worship of Surya that may be familiar to Westerners is the sun salutation in yoga.

Surya

Saros

Star

Starr

Styx

This striking name has a lot going for it: it's a self-confident Spanish surname, it identifies one of the most brilliant stars in the sky, and it has a musical reference to singer-songwriter Suzanne Vega. 

Vega

While this is usually thought of as a girls' name because of the Bond Girl connection, its sound is masculine and there's no reason it couldn't work for boys.

Vesper

Venus

Zenith is an uplifting if quirky word name, meaning the top or the peak. Eight boys received the name in one recent year, only a third of those who were called Nadir -- the low point!

Zenith

Anya Chanel's list "Celestial Nonbinary Enby Unisex Names" of 59 great name ideas: Alpha - Zenith!

Celestial Nonbinary Enby Unisex Names

Great list of names that could be used as anybody. Nonbinary, Enby, Unisex, Gender Neutral, Gender Fluid, Androgynous. Whatever you are I hope you enjoy my list. Galaxy, Space, Planets, Stars, Moons, Constellations, Nebulae, and any other related Celestial names that I think could work for anybody.