Agatha Christie's Poirot

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.

Pugnacious and spunky like the young Mickey Rooney and the original Mickey Mouse, but virtually never given to babies today.

Sixties-style nickname which is also the name of a small biting insect, particularly prevalent in Scotland.

When scientists do research on the effects of an unpopular name, we're afraid that Mildred is one of the examples they cite, often in tandem with Bertha and Gertrude. But with cute nickname Millie on the rise, anything's possible.

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.

Milly and her more popular sister Millie are adorable Old Lady nickname-names springing back to life. Nearly 100 baby girls were named Milly, just Milly, last year, and Millie is in the US Top 500. Milly is the Molly of the new generation.

Minnie was wildly popular at the turn of the last century — it was the fifth or sixth most popular name throughout the 1880s — but is completely obscure today. Blame Mickey's girlfriend. Regardless, it's possible that the up and coming trend toward old-fashioned nickname-names — think Maisie, Mamie, Millie — may give Minnie (all on its own, not as a short form of anything) a new moment in the sun. Minnie Driver (born Amelia) has given it some modern celeb cred.

Miranda, a shimmeringly lovely, poetic name that was invented by Shakespeare for the beautiful and admirable young heroine of his play, The Tempest, is still a recommended choice even though its popularity peaked in the 1990's, partially as an antidote to Amanda. But while Amanda now sounds dated, Miranda retains a good measure of its charm.

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.

The family name of Shakespeare's Romeo has an effete, monocled image.

Other kids might see a teasible connection to mortician or mortuary. Mortimer is an English family name used a few generations ago as an Anglicization of Moses; it was Walt Disney's original choice for the name of his mouse, until his wife talked him out of it.

Once a poetic Celtic name, that of the angel who governs the month of June, Muriel became the mom or grandma on TV sitcoms. She does have literary cred via Edinburgh-born author Muriel Spark, author of The Prime of Miss Jean Brodie and also appears as a character in Anne of Green Gables. Muriel was a Top 200 name from 1912 to 1933.

Part of the vogue for French-sounding names in the 1920s and 30s, Nadine has been replaced by the Russian sound of Nadia and Natasha.

Natalia was derived from the Latin word natalis, meaning "birthday." It refers to the birthday of Jesus Christ, and thus originated as a name for girls born on Christmas Day. Related forms include the French Natalie, Portuguese Natalina, and Russian diminutive Natasha.

Nicholas is derived from the Greek Nikolaos, a name that evolved from the components nikē, meaning "victory", and laos, "people." It shares origins with Nike, the name of the Greek goddess of victory. Nicholas is also a New Testament name that is well-used in literature, such as in Dickens's Nicholas Nickleby.

One of those slender names, like Lena or Etta, that's used in several cultures and carries a range of meanings. But by being so many things, it doesn't feel decidedly like anything.

Invented for Bellini's opera, Norma had some star quality in the silent-screen and Marilyn Monroe days, but at this point it's a graying grandma in baby name limbo.

Norman, perhaps because it sounds so much like the word 'normal', conjures up the image of a normal-looking guy with a normal kind of job-- not necessarily an image many modern parents seek for their sons. But though it's been off the national popularity list for several years, Norman is Number 694 on Nameberry. It was a Top 100 name for more than half a century, hitting a high in 1931 at Number 36, but today it's nowhere near one of the most popular boy names starting with N.