Read or heard 9/25

An Irish county name almost exclusively used for girls now. Kerrigan would be a more modern and masculine choice.

Kevin came to the US with the large wave of Irish Immigrants after World War I, hitting the US Top 1000 list for the first time in 1921 and never leaving.

Kristen may be somewhat past its fashion high point, but it remains forever crystalline clear. Possible problem: confusion with the similar Scandinavian names Kristin, Kirsten, Kirstie, et al.

This streamlined form of a pretty and feminine classic may not be as popular as it once was, but it's never out of style. A royal name best used now in its full glory rather than as nicknames Kris or Kristy.

Kristy (and Kristi and Kristie) are the ultimate kool girl nicknames of the sixties and seventies, not kwite as kute any more.

Kyle is still appreciated by thousands of parents each year for its combination of simplicity, strength, and style; it was in the Top 20 for most of the nineties. As a Scottish surname, it dates back to the fifteenth century.

Lauren was derived from Laurence, an English name from the Roman family name Laurentius, meaning "from Laurentum." Laurentum, an ancient Italian city, got its name from the Latin word laurus, meaning "bay laurel."

Strong but sweet, Leah is a classic name that doesn’t feel dull or dusty. It’s got plenty of dignity, grace, and pluck, making it a solid choice in the 21st century.

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.

Lincoln cracked the Top 50 for boys' names for the first time in 2016, more than 150 years after the death of its most famous bearer. This is especially remarkable because, as crazy as it seems now, Lincoln was deeply out of fashion as recently as the late 90s, consistently hovering near the bottom of the Top 1000.

A girl named Liz on her birth certificate could feel deprived of her full identity. Call her Liz, but name her Elizabeth -- or at least Lizbeth or Eliza.

Lucille is a name that had long been overpowered by its link to Lucille Ball, with an image of tangerine-colored hair, big, round eyes, and a tendency to stage daffy and desperate stunts. But with the newfound craze for double-L names like Lily and Lila, Lulu and Luna, and as the choice of Lucille by hipster parents Maya Rudolph and Paul Thomas Anderson, Lucille is breaking free from its old clownish image, moving rapidly up the charts over the past decade after a long nap.

Luis has long been one of the most popular Hispanic names in America — it was in the Top 100 every year from 1980 to 2014, though it's dropped a bit in popularity. It's familiar, yet would add a worldly touch to a basic surname.

Nickname left over from the last generation.

Thanks to Mariah Carey, everyone now knows this name – and is aware that Mariah's pronounced with a long i – just as Maria was in the Jane Austen era. And though Mariah now sounds modern, it was heard as far back as 1550 in Great Britain.