Quinn is one of the most popular Irish unisex surnames out there, a strong and attractive choice on the rise for girls but still popular for boys. A recent year saw it used for nearly 2690 girls along with 615 boys in the US, meaning its split 80:20 across the sexes.

Cool and charming, with plenty of flair and sophistication, Julian manages to strike the balance between being a sensible classic and contemporary choice. Appealingly international, it is no wonder Julian is a rising star.

Lucas is a Top 10 boys' name with a slightly-less-popular almost-identical twin brother, Luke. Like Elijah and Elias, Lucas and Luke come from the same root and have the same meaning and so feel even more popular than they are.

Nathan is an Old Testament name that's ranked among the Top 100 names for boys for 50 years, and could well stay there for another 50. Strong, solid, and attractive, It's a name familiar to every schoolchild through Nathan Hale, the Revolutionary War spy.

Rachel was derived from the Hebrew word rāchēl, meaning "ewe." In the Old Testament, Rachel was the favorite wife of Jacob, and mother of Joseph and Benjamin. International variations include the Spanish Raquel and Israeli Rahel.

Karen, a once sweet Danish import, was so popular during the baby boom (Karen was Number 3 in 1960) that it's become a mem in recent years, representing a hostile white woman—one who usually wants to speak with the manager.

Combining the mild and the innocent, this sweet and feminine name is worthy of a comeback, in the mode of Madeline and Cecilia. Its original, also attractive form is Melisende, which came from Germany to France and was borne by a daughter of Charlemagne.

The cool form of James in the 1970s and '80s for both sexes. Still a more stylish short form than Jimmy, though many parents will want to call James by his entire, not-very-long name.

Peyton is a unisex surname that rose to fame in the 90s, with parents drawing inspiration from football star, Peyton Manning, and, oddly enough, from "Peyton Flanders", the villainess of the 1992 film, The Hand That Rocks The Cradle. Combining gentle sounds with contemporary style and the naughtiness of Peyton Place, the name remains a popular choice in the US today.

Strong but gentle, Keith is one of the Scottish surnames that, along with Douglas, Craig and Bruce, were considered the epitome of cool in the 1960s and early 1970s, when it was a Top 40 choice.

Clay is a rich, earthy one-syllable name with a southern-inflected handsome-rogue image, featured on soap operas and reality TV. Its longer forms are Clayton and Clayborne.

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

Chris is a long-running nickname used almost equally for boys and girls. While past its prime, Chris stands out as sounding completely appropriate for both sexes, perhaps because of its widespread use as a short form of both the popular Christopher and Christine. Chris manages to retain its crisp appeal even though its fashion moment is over.

Often stands alone in Israel, but rarely here.

One of the most evenly divided unisex names these days; strong and energetic, if overused, for both genders.

The second most popular spelling of this name is also the most straightforward.

During the heyday of Deborah, Debra, and Debra — the late 1950s and early 60s — there were enough baby girls named Deb, just Deb, for it to make the Top 1000.