Castle!

Kaye and its more popular sister Kay, once common short forms of the perennially popular Katherine, are now on the endangered list, given to fewer than 50 baby girls each year. But maybe that makes them prime for a comeback? Rarer than Kate, in any case.

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.

The girls' name Kyra sounds like the also popular Keira/Kiera, but has a different root. There are twice as many baby girls named Keira as Kyra, with Kiera in third place. Kyra now ranks at #590 and is most familiar via actress Kyra Sedgwick.

Lazarus is a name that looks as if it could possibly be raised from the dead, just like its biblical bearer. Look for it in the next wave of Old Testament revivals that transcend their long-bearded images, the way Noah, Moses, and Abraham have for this generation.

Maddox, a previously obscure Welsh family name with a powerfully masculine image, suddenly came into the spotlight when Angelina Jolie chose it for her son in 2003. By the following year it was in the middle of the Top 1000, and it has risen since.

Since we wrote a book called Beyond Jennifer & Jason, Madison & Montana, encouraging parents to move beyond overused names, it's no secret what we think of this trendy surname name, inspired by a mermaid named Madison in the 1980s movie Splash.

Though ancient, Marcus now sounds more current than Mark, in tune with today's trend towards us-ending Latinate names.

This pretty sea-born name was used to dramatic effect by Shakespeare in his play Pericles for the virtuous princess who says she is "Call'd Marina, for I was born at sea."

The name of our first First Lady still has something of a prim and proper image, academic and efficient. That quiet, traditional, and tasteful gestalt is exactly what makes Martha appealing to some parents today.

Martin is one of those names like Arthur and Vincent and George that is in the process of throwing off its balding middle-aged image to start sounding possible again, used in full without the dated Marty nickname.

Maya, which has an almost mystical image, has been steadily climbing in popularity in the US and the English-speaking world, along with a range of other countries, including France, Germany, Israel, and Brazil. It's ranked in the US Top 100 since the turn of this century, but has never risen to the top of the list, which you may consider a good thing.

Meredith is a soft, gentle-sounding name with subtle Welsh roots. Although originally a boys’ name , Meredith is used mainly for girls now.

Michael was the Number 1 American boys' name for almost half a century. While Michael has moved out of the Top 10 baby boy names, it's still widely used.

Molly is one of the original nickname names, ALWAYS ranking among the US Top 500 girl names since statistics began, in 1880. Molly peaked in 1991 only to rise just as high again in 2011, and though softening retains a good measure of popularity and charm.

A new favorite of the bohemian set, brought to light by actress Monet Mazur, daughter of the artist who designed the Rolling Stones' mouth logo.

This image of this distinguished Anglo-Scottish surname, drawn from the French place name of the ancient castle of Saint Foi de Montgomery, is rapidly shifting from fusty and formal to cool. And dashing short form Monty (or Monte) nudges it to cute.

This jaunty Celtic surname -- the most common family name in both Ireland and the US -- is totally viable as a first. The arguably most famous Murphy is TV's Murphy Brown, and indeed the name is twice as common for baby girls as for baby boys today. But still, it's solidly gender neutral and works equally well for all sexes.

Natalie—a Franco-Russian name—became Americanized years ago and is one of those surprising names that's always ranked among the girls' Top 1000 names in the US.

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.