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 boy names starting with J.

Ezra has a lot going for it: the strength of its heroic Biblical legacy, its quirky sound, and its fresh but familiar feel. Ezra is now at its highest point ever, but its intuitive streamlined spelling and deep roots could make it a worth successor to Elijah in the Top 10 -- or even to Liam or Noah at Number 1.

Scarlett Johansson is doing more for this sparky southern name than Scarlett O'Hara ever did. Since the turn of the 21st century, Scarlett has gone from an obscure literary name to one of the most popular girls' names starting with S, right after longtime favorites Sophia and Sofia.

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.

Kai is an internationally flexible name with many possible origins and meanings, growing in popularity in the US and a diverse range of European countries.

Max was derived from Maximilian, a Latin name that originated from the Roman family name Maximus. The character name Max in the children's classic Where the Wild Things Are had an impact on baby namers. Max is a widely used name internationally.

As a stylish name, Ryker has three big things going for it: its Ry beginning (as in Riley, Ryder, and Rylan), its two-syllable rhythm, and its er ending. A nice surprise for many is it's "rich" meaning. While this may not be a factor beyond New York City, there is an infamous prison there called Riker's Island. Ryker is one of the trendiest German names for boys in the US.

Rhett has been more tied to Gone with the Wind than even Scarlett, but now we're hearing rumblings of its finding new and independent favor among parents, perhaps emboldened by the growing popularity of Scarlett.

Zara has multiple origins, but most notably is a variation of Zahrah, a name derived from the Arabic zahrah, meaning "blooming flower." Zara can also be a diminutive of the Bulgarian name Zaharina, a feminine form of the Hebrew Zechariah. Today, Zara is heavily associated with the Spanish fast-fashion empire of the same name.

The independent Alex has become a classic in its own right. One of the truest unisex names, Alex is used almost equally for both sexes. Alex is used both on its own and as a short form of formal names of both genders, such as Alexander, Alexandra, and Alexis.

Evie was derived from the English Eve or the Latin Eva, which in turn come from Chawwah, a Hebrew name related to the concept of life. Evie can be used as a nickname for any name that starts with Ev-, including Eva, Evelyn, and Evangeline, but also for names such as Genevieve and Maeve. Evie is typically pronounced with a long E sound, but a short E is also valid.

Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers.

Brooke has long projected an aura of sleek sophistication, and can also be seen as a stylish water name.

A Swahili name with a positive meaning, Zuri came to the attention of American parents when an Ohio zoo used it for a female giraffe. It subsequently shot up the charts in 2010, peaking in 2022 when it reached the Top 200. A more recent year saw it given to 1140 girls (and 22 boys).

Kate, in the headlines via Catherine Middleton aka the Princess of Wales, has been as pervasive as Kathy was in the 1950s and 1960s, both as a nickname for Katherine and Kaitlyn and as a strong, classic stand-alone name.

Cleo, one of the few girls' names to boast the cool-yet-lively o ending, is of course short for Cleopatra, the name of one of the most powerful women in history.

Lexi and Lexie, pixieish offshoots of the prolific Alex family, have come into their own. While it's on a gentle downslope, Lexi still ranks in the US Top 500.

The jazzy, ultra-cool Dexter, like most names with an "x," has a lot of energy and dynamism.

Zeke is a casual form of the name Ezekiel, an important prophet from the Old Testament. How well Zeke holds up depends on the boy: it could be a cooler alternative of Zack, or it could prove too close to "geek." Both Zeke and Ezekiel lag behind in popularity on the UK charts.

Kenny might be all South Park to some, but it has been in steady use in the US since the 1930s.