Adlai is an Old Testament name long associated with 1950's liberal presidential candidate Stevenson, who was named after his grandfather, who was Grover Cleveland's vice president in the nineteenth century. Now it's an unusual Biblical choice ripe for rediscovery.
 In the Bible, Adlai was a minor character, the father of one of King David's herdsmen. Adlai is a contracted form of the Hebrew name Adaliah.

Adlai

Adrian is one of those names that’s easy to picture on all kinds of people. From an active and energetic five-year-old to your great grandpa, from the coolest, breeziest guy you know, to the quiet, serious one, it’s no wonder Adrian has always made the US Top 500 since the early 20th century. 
Trending upwards since the 60’s and breaking in the Top 100 in the 90’s, Adrian has remained a solid choice for boys. Popular across Europe and in some parts of South America, Africa, and Aisa too, Adrian is a well-travelled and international choice. 
Derived from Hadrianus, a Roman family name meaning ‘from Hadria’, Adrian is associated with two ancient settlements in Italy – Adria, a northern port town, and Atri, in central Italy. 
Hadrianus itself is likely to have derived from an Illyrian word meaning “sea” or “water”, leading some scholars to record Adrian’s meaning as ‘from the sea,” making it consideration for those wanting an <a href=“https://nameberry.com/list/641/names-that-mean-ocean”> ocean inspired name</a>. 
Adrian has been in use since the Middle Ages and is the name of several saints and six popes. It has been a favorite in England since the 1950’s and appears in different forms across the world, from the Italian Adriano to the feminine forms Adriana and Adrienne. 
The versatile Adrian is used frequently in pop culture and notable Adrians include Adrian Mole, the eponymous character of Sue Townend’s comedic novels and Adrian Chase, an anti-hero in the TV show “Arrow.” Appearing in Harry Potter, the works of Shakespeare and the Marvel Universe too, Adrian isn’t short of namesakes. 
Ranking highly in Spain, Norway, and Sweden, and given to over 5000 American boys every year, Adrian is a solid, international choice. If you love the name but would prefer more unexpected however, you could try Caspian, Ariel, Kylian, Alasdair, Lucian, or Dorian.

Adrian

Alexander has been in a Top 25 boys' name in the US for 30 years now. But namers are still attracted to its imposing historic pedigree.
 Alexander is derived from the Greek name Aléxandros, composed of the elements aléxein, meaning "to defend," and aner, meaning "man." 
 
According to Greek legend, the first Alexander was Paris, who was given the nickname Alexander by the shepherds whose flocks he defended against robbers. He was followed by Alexander the Great, aka Alexander III, who conquered much of Asia.
 
A royal name in Scotland, Alexander is still highly popular there. In Gaelic, the name became Alasdair; in Spain, Alejandro; and in Italy, Alessandro.
 
The noble Alexander has led to the popularity of many spinoffs, such as Alex, Zander, Xan and Zan, along with female versions such as Alexandra, Alexis, and the unfortunate Alexa.
 Among the many notable Alexanders in history, standouts are Hamilton, Graham Bell, Fleming, Pope and Haig.
 Naomi Watts and Liev Schreiber's Alexander is known as Sasha.

Alexander

One of Dumas' swashbuckling Three Musketeers, now better known as a men's cologne. 

Aramis

Though this name is rooted in Greek mythology, it just entered the US Top 1000 for the first time in 2013, but as one of the year's fastest-rising names.

 In Greek mythology, Ares was the blood-thirsty god of war and son to Zeus and Hera. Names from ancient myth and legend are generally on the rise, as is evidenced by Gwen Stefani's choice of Apollo for her third son.

Ares

Arto

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

Aurik

Birk

Domenik 

Creative gem perfect for an architect's son, in tribute to modern Finnish-American architect Eero Saarinen. 

Eero

While substituting a C for a K is a modern trend, Erik is in fact the traditional spelling of the name, derived from the Old Norse Eiríkr and introduced to the English speaking world in the Anglo-Saxon period. Now, Erik is popular in Scandinavia and throughout much of Central and Eastern Europe, where it ranks in the Top 100 in Germany, Slovenia, Hungary, and more.

The Erik form remains on style in the UK where Eric feels outdated and both Erik and Erick are preferred in Spain, Latin America, and among Spanish Speakers in the US.
 
Erik is the least popular form of the name in the US charts, outranked by Eric and Erick - however, all three remain in the Top 500, and when you add all the Eric/ks together, it begins to feel like a name that ranks just outside the Top 100, in tune with August, Myles, Nicholas and Xavier. 
 
Love the Scandinavian feel of Erik? Magnus, Ivor, Ivar, Henning, Halsten, Emrik, or Torkel might provide some further inspiration.

Erik

Ennio 

Falk

Fedor

A Julian derivative, via Spanish conquistadors, that could be a more unusual yet still reasonable substitute for that current favorite. 

Halian

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

Leif is one of the most recognizable <a href="https://nameberry.com/baby-names/173/scandinavian-names">Scandinavian names</a>, thanks to Icelandic explorer Leif Erikson, and is still one of the best, with a pleasant aural association with the word leaf. 
 Leif Erikson, son of explorer Eric the Red, was the first European to land in North America--some five hundred years before Columbus. Centuries later, the name became associated in the U.S. with 1970s teen idol Leif Garrett, the name peaking on the charts at Number 654 in 1970, dropping off completely in 1987. It climbed back onto the Top 1000 in 2014.
 Pronounced LAYF in its Scandinavian milieu, Leif and Lief are sometimes pronounced as Leaf in English-speaking countries. Joaquin Phoenix was for a time known as Leaf, in keeping with the <a href="https://nameberry.com/list/329/nature-baby-names">nature names</a> of his siblings.

Leif

Lior is a unisex name frequently heard in Israel, capturing the popular light theme through its meaning.  For English speakers, the one down side is possible pronunciation confusion with "liar," though it's really lee-OR, with a long e sound and emphasis on the second syllable.

Lior

Laikon 

Lenz

Lowen 

Lutz

Magnus is a Latin name, literally meaning "greatest," that has a Scandinavian feel. It dates back to Charlemagne being called Carolus Magnus, or Charles the Great. Norwegian king Magnus I, named after Charlemagne, introduced it to his culture, and thus Magnus was the name of six early kings of Norway and four of Sweden. It is still a highly popular name in Denmark and Norway.
 
Magnus, a powerful name with a commanding presence, is one of the newly unearthed ancient artifacts. It was picked for their sons by Will Ferrell (whose wife Viveca Paulin is Swedish), Kristy Swanson, and Elizabeth Banks—likely credited for this name's jump into the Top 1000 for the first time in 2013, as one of the year's fastest-rising names. Its fashionable s ending may keep it in popular use.
 
Magnus has made appearances as a vampire in Anne Rice's Vampire Chronicles and as a character in Roald Dahl's Matilda. And for an extra ego boost, in Charles Dickens's The Pickwick Papers, there's the following dialogue: 
 "'Magnus is my name. It's rather a good name, I think, sir.'
 'A very good name, indeed,' said Mr. Pickwick."

Magnus

Niccolo 

Niro 

Pasco

It may be a longshot – especially since it was given to less than 5 boys in the US in 2021 – but Piran could conceivably be a future Kieran, which is shaping up to being the next Kevin. Piran is the patron saint of miners and of Cornwall.


Piran

In France, pronounced PRO-spare, Prosper is a fairly common name; here it presents a worthy aspirational message for a child. 
 Prosper was the name of several early saints, including a noted fifth century theologian, St. Prosper of Aquitaine, and was a favorite of English Puritans.
 Prosper has strong associations with P.Merimee, who wrote the novel Carmen, upon which the opera is based. Prospers were also the protagonists of two other books, The Shining Company by Rosemary Sutcliff and The Thief Lord by Cornelia Funke.
 The Italian version, Prospero, is another attractive option, with ties to Shakespeare's magician character in The Tempest.

Prosper

Energetic, sunny, and slightly romantic, Rafael is a popular choice in Germany, Spain, Portugal, and Croatia. Used internationally, Rafael is a Spanish variation of Raphael, that lends itself easily to the nicknames Rafi, Rafa and Rafe.
 
Derived from a Biblical, Hebrew name, meaning "God has healed", Rafael is associated with both an archangel in The Old Testament and with the master Renaissance artist.
 
With its lighter, more concise appearance and Its hint of flair and fun, the Rafael spelling is perhaps most famously borne by tennis play, Rafael Nadal. 
 
Popular but not too popular in multiple different countries around the world, Rafael sits in the Top 100 in Mexico, Switzerland, Chile, and Uruguay,.
 
In the UK, it climbed to #181 in 2022 (though Rafferty and Raphael still outrank it), while in the US, it has been the favored spelling since the 1920s.
 Given to 1500 babies in the US each year, Rafael fits in with currently trending choices like Jaziel and Azriel, while still feeling perfectly familiar.

Rafael

In the USA, both spellings of this old Celtic name have risen significantly in recent years, however, Ronan outpaced this version in the lasts, and we, too, prefer the slightly more rounded and gentle look of the original. History and movie buffs may appreciate this version though, due to its association with renegade samurai in Feudal Japan - and provides it with a second possible meaning: "drifter, wanderer, and masterless samurai". Ronin is also used within the Marvel Universe.
 
Ronin is currently in the US Top 500, and in recent years, it has been given to around 640 babies each year.

Ronin

Rion 

Teron

Tristan -- known through medieval legend and Wagnerian opera -- has a slightly wistful, touching air. This, combined with the name's popular "an" ending, makes Tristan very appealing to parents seeking a more original alternative to Christian.
 One influence was the character Tristan Ludlow played by Brad Pitt in the 1994 movie Legends of the Fall, based on a Jim Harrison novel.
 Tristan is a dragon-slaying hero of Celtic legend, whose story was incorporated into Malory's Le Morte d'Arthur, in which Tristan is one of the Knights of the Round Table, consumed by his doomed love affair with Queen Isolde. Wagner set the story to music in his opera Tristan und Isolde.
 Tristan and its alternate form Tristram have been found in later lit as well. Tristram Shandy is a famous early comic novel by Laurence Sterne (in which the hero's father calls Tristram the worst name in the universe); Tristan is a major character in James Herriott's All Creatures Great and Small, and there is an eponymous novella by Thomas Mann.
 Particularly popular in Canada, Tristan was chosen for their sons by Travis Tritt, Wayne Gretzky, Natasha Henstridge and, most recently, by Elsa Pataky and Chris Hemsworth. Basketball player Tristan Thompson hails from Canada.
 Other variants of Tristan include Tristen, Tristin, Triston and Tristian.

Tristan

Tenoch 

Tizian 

Troian 

Eva_Karina's list "Male names collection 2" of 37 great name ideas: Adlai - Troian !