For centuries this name was associated primarily with the towering figure of Italian Renaissance painter-scientist-inventor Leonardo da Vinci, and was scarcely used outside the Latin culture.

Lionel is one leonine name that hasn't taken off as cousins Leo and Leonardo have, though it did reenter the Top 1000 in 2010 after several years away; it was at its highest point in the 1920s and 1930s.

Leonie is a chic French and German form of a name that exists in a range of variations from Leona to Leonia to Leon to Leo to Lionel, all newly fashionable after a couple of generations in style limbo.

Leonard is the name of several saints, including one who is the patron saint of childhood, and another medieval saint who's the patron of prisoners--known for freeing prisoners he deemed worthy of God. Popular from 1900 to 1930, Leonard is perhaps more notable for those who dropped the name when they entered show biz than those who kept it: former Leonards include Roy Rogers and Tony Randall. Two musical Leonards did keep their names though--composer-conductor Leonard Bernstein and poet-singer Leonard Cohen. Leonard Woolf was the husband and publisher of great English novellist Virginia Woolf. These days, modern parents tend to prefer Leo or the romantic Italian Leonardo, especially since Leonard does not get pronounced with the trendy "Leo" sound.

Cataleya is the name of a genus of orchids that gained visibility as a baby name after it was used for the character played by Zoe Saldana in Colombiana. Part Caitlin, part Aaliyah, and part Leah, Cataleya is a trendy choice that just might transcend its momentary popularity. It is a spelling adaptation of Cattleya, named after the British horticulturalist William Cattley.

This concise one-syllable name, has two possible derivations and two positive meanings associated with it. In Hebrew, it means "heart", while in Russian it means "lion". So strong and simple Lev has both a soft and a fierce side.

Kathleen is the early Irish import version that came between Katherine and Kaitlin, and which hasn't been used in so long it's almost beginning to sound fresh again. It was a surprise pick by one of the hip Dixie Chicks, Martie Maguire. Kathleen was a Top 10 name from 1948 to 1951, and it is the subject of several old sentimental songs, such as "I'll Take You Home Again, Kathleen."

This name of three early popes has been associated in recent years with a cocky cartoon cat ("Thufferin' thuccatash!") and the Italian Stallion hero of the Rocky and Rambo movies (who was born Michael) — and yet we think it just might be ready to move further back into the mainstream.

Lucifer is the name of the archangel cast into hell and while theologians disagree on whether he and Satan are separate beings, it long been on the list of forbidden names for religious and non-religious parents alike. With connotations of hell and devilry so strongly attached to it, the name is officially banned in some places, including New Zealand.

Ariel is a male Biblical name, seen there as the messenger of Ezra, and also used as a symbolic name for the city of Jerusalem, while Shakespeare used it for a (male) sprite in The Tempest.

Leonidas is an ancient name that has started rising again along with centuries-old names such as Augustus and Cato. The original Leonidas was the most famous of Sparta's warriors, sacrificing his life at the Battle of Thermopylae; there is also a saint Leonidas.

Cato conjures up images of ancient Roman statesmen and southern antebellum retainers; it could have revival potential, with its 'O' ending and the current interest in the names of Greek and Roman antiquity.

This variation of Ariel, with the extra-feminine suffix, has been on the rise in recent years and has now surpassed the original. The similarity to the name of the Little Mermaid gives Ariella a princessy flair. Ariella entered the charts in 2008, and has now risen into the Top 200. The cute nickname Ari is on trend as seen with the popularity of Ariana and Arianna, as are any girl names ending in "-ella", making Ariella a natural hit. Arabella is another name with the best of both of these trends.

This endearing nickname name is one Katherine pet form that predates all the Kathys and Katies, having been fairly common in the eighteenth century. With the current mini-craze for animal-related names, Kitty is sounding cute and cuddly again—she's already jumped back onto the U.K. list, at number 199.

Despite its distinguished pedigree and popularity in Israel, Disney's Little Mermaid cartoonized Ariel in the US, at least in some people's minds. But it was used for a male character in Shakespeare's The Tempest centuries ago.

A nickname of yesteryear that like alongside Reggie, Alby, Archie, and Bertie, is back in consideration. Already in the UK Top 200, a high-ranking choice in Switzerland and a familiar option in The Netherlands and France, this friendly feeling short from of Leonard might appeal to those who like Freddie and Teddy.

This name of a touristed island in sight of Los Angeles makes an attractive and newly stylish variation on the classic Catherine or overused Caitlin.

Most familiar in the English speaking world as the Star Wars princess, Jedi, and leader, Leia can be considered a pop culture choice, created by George Lucas who in turn likely based it on the Biblical Leah. It has been in the US Top 1000 since the mid-2000s and is also a popular choice in the UK and Sweden.

The Koi is a variety of carp especially popular in ornamental gardens in Japan, where they are a symbol of good fortune. In Buddhist culture, the koi is associated with courage. Being one letter away from trendy Kai boosts its prospects as a cool unisex name.

In 2010, baby boys named Ari outnumbered baby girls 4 to 1; today, there are nearly equal numbers of boys and girls named Ari. And that's only counting the babies who receive Ari as a full name. Ari can also be short for not only Ariel but Aria, Arya, Ariana, and any other name starting with Ari. Ari entered the US Top 1000 for girls in 2016.