Better strictly as nicknames

This spelling adds a little more femininity to the neutral Lee. Leigh and sister Lee were quite popular in the 1960s and 1970s among the first cool wave of unisex names for girls, but now have vanished from the Top 1000. The Biblical Leah is preferred.

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.

Lexi and Lexie, pixie-ish offshoots of the prolific Alex family, have come into their own, remaining in the Top 1000 for more than 20 years now.

Liv combines the succinct charm of a nickname—people might assume it's short for Olivia—with the solidity of being a classic stand-alone Scandinavian name with a life-force meaning. It was brought into the public eye (in the English speaking world that is) due to the fame of actress and Aerosmith daughter Liv Tyler.

Lula has a firecracker personality, a singing and dancing extrovert. Interesting that Lulu was a Top 100 name when the Social Security list was born in 1880, but it's been sliding ever since and has not been in the Top 1000 for decades. Modern parents in love with Lulu might well reverse that trend.

Lynn arrived in the 1940s, spinning off from the wildly popular Linda, to become a top midcentury middle name. Now, Lynn's in limbo.

Has a slight aura of danger, from its being two types of weapons and a looming character in the Star Wars films. Best left as a nickname for Mason.

Singer Macy Gray has popularized this cute and upbeat choice—once solely associated with the department store. A modern replacement for Stacy and Tracy, Macy was most popular in the early 2000s when it nearly made the US Top 100.

A super diminutive nickname name, and sometime Madonna nickname – it was how the British tabloids referred to her when she moved to London in the 1990s, which she found annoying until then husband Guy Ritchie said it stood for 'Your Majesty'. Madge Undersee is Katniss's best friend in The Hunger Games books.

Mae, a sweet and springlike old-fashioned name, hadn't been on the national charts in forty years, but finally made it back in 2010. Mae is derived from May, the month name that was chosen for its connection to Maia, the Roman goddess of growth and motherhood.

Maisie, a charming name long popular as a nickname for Margaret or Mary, entered the Top 1000 as itself ten years ago and continues to rise. Game of Thrones star Maisie Williams helped propel the name back into the limelight, along with the that of her character, Arya.

Mamie is back. Having finally shorn her Mamie Eisenhower bangs, this insouciant and adorable nickname name is perfect if you want a zestier way to honor a beloved aunt Mary. Meryl Streep's actress daughter, properly named Mary Willa, is called Mamie Gummer. You might think of Mamie as a sister of the stylish Maisie.

Nickname left over from the last generation.

May is a sweet old-fashioned name that hasn't been on the national charts in several decades, but is definitely sounding fresh and springlike. Parents are beginning to see it once more as one of the prettiest middle name options. May was as high on the list as Number 57 in the 1880s; it's now 228 on Nameberry.

Mia is an appealingly unfussy multicultural name that has enjoyed a meteoric rise up the charts and is now firmly among the ten top girl names. Mia has surpassed its mother name Maria as the Number 1 girls' name starting with M.

Mika is a sparky and stylish Japanese girls' name that translates easily to English. Also used as a Slovene and Hebrew diminutive for Mihaela and Michaela, as an alternative spelling to the Biblical Micah, and as a Greek diminutive of Dimitra (via Mimika), it is a truly multi-cultural choice.

Mila is a popular name that took a 125 year nap, ranking in the Top 1000 in 1881 and then not ranking again until 2006, after actress Mila Kunis appeared on That 70s Show.

A name that works until your daughter is, say, six.

The Play Misty for Me jokes will get old really fast.

Mitzi is a spunky German nickname name that might appeal to parents drawn to the genre of lively vintage chorus girl names that proliferated in 1930's musicals. Lively entertainer Mitzi Gaynor--who was originally named Francesca Marlene de Czani von Gerber--made the name notable in mid-century America.