Killian – aka Cillian – is a spirited yet resonant Gaelic name that was borne by several Irish saints and could make a distinctive replacement for the dated Kelly. Kylian is another spelling that's gaining traction, thanks to French soccer star Kylian Mbappé. Possible downsides: an unsavory first syllable and a connection to the trendy brew.

Walker is both a Waspy surname name—as in the W in George W. Bush—but it also has a gentle ambling quality and a creative connection to such greats as writer Walker Percy and photographer Walker Evans, whose father was also named Walker.

Blake -- an early unisex option -- dropped out of the Top 100 in 2017 for the first time since 1988, but remains a sophisticated choice. And yes, both conflicting meanings of Blake are accurate. It originated as a surname in England derived from a nickname. Much of its masculine image was influenced by the wealthy, silver-haired character Blake Carrington in the massively popular 80s TV series Dynasty. Rosie O'Donnell has a son named Blake.

Kyler was once a creative solution for 90s parents who enjoyed the sounds of Kyle and Tyler but didn't want to use anything so popular. Now a well-established name on the US charts, it is given to more than 1000 babies every year.

Kayla is a modern invented name that emerged in the late 1950s. It may have been inspired by the similar sounding Michaela, though it could equally have come about as a combination of the then popular name popular name Kay and the familiar -la suffix.

Lark is getting some new and well-deserved attention as a post-Robin and Raven bird name. Although it was first recorded as a name in the 1830's, it has never appeared on the Social Security list.

Kathleen is the early Irish import version that came between Katherine and Kaitlin, and which hasn't been used in so long it's almost beginning to sound fresh again. It was a surprise pick by one of the hip Dixie Chicks, Martie Maguire. Kathleen was a Top 10 name from 1948 to 1951, and it is the subject of several old sentimental songs, such as "I'll Take You Home Again, Kathleen."

As sturdy as Oak, but with stronger roots as a first name, Oakley ticks lots of boxes for modern trends. With its unisex vibe, its nature-based meaning, its surname-y feel, and its popular -lee ending, it's not wonder Oakley is on the rise.

Kyle is stronger and sharper, though many parents will prefer the more distinctly feminine Kyla for their daughters. Kyla may owe much of its popularity to trendy cousin Kayla.

The unisex Blake, which indeed has two conflicting meanings, has a briskly efficient image when used for a girl.

A doubly Presidential name, via Pierce and Roosevelt, Franklin was given an initial boost via the fame of Benjamin Franklin. It also has a literary tie to the main character of the Wilkie Collins classic The Moonstone.

A tributary of the River Clyde in Scotland, called in Scottish Gaelic Abhainn Cheilbhinn: caol ("narrow") or coille ("wooded") + abhainn ("river"). As a surname, it derives from the name of the river.

Usually adding an e to the end of a name makes it more feminine, but Locke is at most recent count used only for baby boys. Still, this stylishly strong one-syllable name is theoretically gender-neutral.

Luka is one of the coolest names in recent years, following suit of its cousin Luca which is now a Top 50 name. Luka is on its way up the charts and may crack the Top 100 in the very near future. Luka has a lot going for it — it is following the tails of Lucas and Luke which have been enjoying significant popularity for years. It also boasts the very current "-ah" ending sound that feels fresher than ever for boy names, from Noah to Ezra to Judah. The "k" in the middle gives an extra edge as well. This spelling is the traditional form of Luke in various Eastern European countries.

Once the quintessential bouncy teenager name, Kelly helped launch the trend of unisex Irish names . But it now takes a backseat to more substantial surname names like Kennedy.

Now the best-selling version of this infinitely varied name, Makayla incorporates the also-popular Kayla. Makayla and Mikayla have now left the original Michaela far behind.

Extreme makeover: Brooklyn has gone from jokey Borough Boy name in the 1990s to a leading girls' name starting with B. The status of New York's Brooklyn as hipster heaven is ironic as few bona fide Brooklyn hipsters would choose this name.

Two drawbacks: some unpleasant World War II associations, and the Santa clause.

Highly popular in Germany, Norway, Lithuania, and Austria, Lukas is a spelling variation of the also extremely popular Lucas. The "K" spelling gives it extra kick and a more international, globe-trotter feel.

While Skylar is currently the most popular spelling choice for girls, the Skyler option is more (statistically) unisex. Given to boy and girls in nearly equal numbers each year, it ranks around the middle of the US Top 1000.