Adelaide is now heading straight uphill on the coattails of such newly popular sisters as Ava, Ada, and Audrey, and in the company of Adeline and Amelia. It was chosen by actress Katherine Heigl for the name of her second daughter.
 Adelaide gained fame as the noble German princess who married the British King William IV in 1830 and became known as "Good Queen Adelaide," inspiring the name of the Australian city and a craze for her name. Earlier, St. Adelaide was married to Otto the Great and became Empress of the Holy Roman Empire, described as "a marvel of beauty and goodness."
 When Aussie actress Rachel Griffiths (also mother of son Banjo) chose Adelaide for her daughter, she said she'd been inspired by the city, Miss Adelaide in Guys and Dolls, and the Disney character in The Aristocats. Adelaide can also be found in works by Thomas Hardy and Agatha Christie.

Adelaide

This biblical name is getting wider notice. While Adrian has had its time in the limelight since the late 70s, parents are beginning to look for fresher alternatives. 

In the Bible, Adriel was the husband of Merab, a daughter of King Saul. Adriel, like other names ending in -el like Gabriel, Raphael, and Uriel, is also the name of an angel. The angel Adriel is known as the Angel of Death.

Adriel entered the charts in 2002, and has risen now into the Top 200. 

Adriel

For anyone seeking a more unusual version of Alexander, this is a real winner.
 Notable namesakes include the great Italian opera composer Scarlatti and the influential physicist Alessandro Volta, known primarily for the invention of the battery you use every day — as well as the contemporary hunky actor Alessandro Nivola. 
 Appealing short forms are Alessio and Sandro (as in Botticelli).

Alessandro

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

The Spanish form of Andrew is popular enough in the US to rank near the Top 200. As Andrew, Andy, and Drew feel less fresh, Andres is still up-and-coming, with a global feel that could travel well anywhere.

Andres has been used in the US dating all the way back to when name data began to be kept, and has never fallen out of the Top 1000. Despite this, it has only been since the 90s that Andres has cracked the Top 200. Andre is a similar-sounding alternative that has French and Portuguese roots. 

Andres

Andy

As a boys' name, Angel has two distinct name personalities. One is as a perennial favorite Hispanic <a href="https://nameberry.com/boys-names">boys’ name</a>, popular in the US along with Spain, Mexico, and South America.
 
Then Buffy the Vampire Slayer brought Angel into the Anglo camp, where it's now heard more frequently, pronounced the English way. Angel entered the boys' Top 100 in 1997 and remains solidly there today.
 
Angel's popularity for girls began to wane at the same time the name took off for boys. Any child named Angel, of whatever gender or nationality, has a, well, angelic image to live up to or live down.
 Other notable male Angels: the husband in Thomas Hardy's Tess of the D'Urbervilles, a character on Dexter, and several athletes.

Angel

Antonio is a Shakespearean favorite -- the Bard used it in no less than five of his plays, and has long been a ubiquitous classic in Spanish-speaking countries, where the nickname Tonio is also prevalent. Antonio is also among an elite group of perennially popular names in the US, where it has always been among the boys' Top 1000 since baby name record-keeping started in 1880.

Antonio

Arik

Avery is a hugely popular name in the US, especially for girls. But while nearly four times as many girls as boys are named Avery today Avery's popularity is starting to soften for girls while it continues to strengthen for boys.

Unlike many gender-neutral surname-y names popular today, Avery began life as a first name and later became a patronymic last name. It originated in the Middle Ages as a Norman-French pronunciation variation of the Anglo-Saxon name Alfred and the Ancient Germanic name Alberich. The elements aelf, meaning "elf" and ric, meaning "ruler" give Avery its meaning. 
 
Angie Harmon and Jason Sehorn may have started it all when they chose it for their daughter in 2005, just as they did with daughters Finley and Emery. Amy Locane used the name in 2009 and now Dr. Phil has a granddaughter named Avery.
 
On 30 Rock, Elizabeth Banks had an extended cameo playing Alec Baldwin's glamorous fiancée, Avery Jessup.

Avery

Ayden in all its variations is becoming more unisex. Still, there were only 47 girl Aydens born last year vs. 3600+ baby boys with the Ayden spelling alone.

Ayden

Bright, fresh, and sunny, Ayla is a fashionable choice for girls. Reminiscent of other trending names such as Layla, Isla, and Ava, Ayla has recently found its place in the Top 100. 
At first glance, Ayla appears to be short, sweet, and simple – a modern invention, perhaps – but don’t be deceived. Like many names, it has different pronunciations and various origins, making it an exciting and international choice. 
In Turkish, Ayla is pronounced “Eye-luh”, meaning “halo” or “moonlight,” whereas in Hebrew, it could be a modern take on the Biblical “Elah” meaning “terebinth tree,” from “Alon” meaning “oak tree”, or, from “Ayelet” or “Ayala” meaning “doe, deer, gazelle.” 
Alternatively, Ayla is a literary name, created by Jean. M. Auel, for her novel Clan of the Cave Bear.” Pronounced “Ay-luh,” the independent heroine inspired American parents to use the name, and following the release of the film adaptation in 1986, it leapt straight into the Top 600. 
Internationally popular, Ayla ranks highly in the UK, Sweden and Azerbaijan, and is on the rise in France and Belgium. 
 In the US, over 2500 girls are given the name each year, meaning it has more than doubled in usage over the last decade. 
Notable namesakes include the American singer, Ayla Brown and the Turkish politician and activist, Ayla Akat Ata. A popular choice among influencers too, “The Flo Fam”, “Sunkissed Mama,”, and “The Prince Family” all have daughters called Ayla. 
As lovely as the name is, in its own right and as an alternative to a Top 10 choice, it may be worth keeping in mind how similar Ayla’s sounds are to those high-ranking names. This couldlead to confusion between Ava/Isla/Ayla, or to Ayla feeling more popular than it actually is. 
If you do love Ayla but want to stand out from the crowd a little more, you could consider Mira, Eira, Liora, Alara, Miray, or Aviya for their similarity in sound or feel.

Ayla

Aaron/Aeron

Adalyn/Adalynne

Adrien/Adrian

Aiden/Aidin/Aidan

Alaska

Anakin/Aniken

Anies

Araia

Arizona

Arya/Aryia/Ariya

kkleinh's list "A Names - interesting - alphabetical order" of 24 great name ideas: Adelaide - Arya/Aryia/Ariya!