Names from The 100

The appealingly energetic Dax, with its trendy X-ending, re-entered the Top 1000 in 2007. Its somewhat sci-fi vibe emanates from his appearance as a fictional being in the Star Trek universe, seen on the TV show "Star Trek: Deep Space Nine." The Power Rangers character Dax Lo was the Blue Ranger.

Popular President Franklin Delano Roosevelt inspired a brief fashion for this as a first name in the 1940s; almost never heard today.

Echo, the pretty, resonant name of a legendary nymph, was the heroine of Joss Whedon's sci-fi series Dollhouse. Nick Hexum, of the band 311, named his daughter Echo Love.

Finn is a name with enormous energy and charm, that of the greatest hero of Irish mythology, Finn MacCool (aka Fionn mac Cuumhaill), an intrepid warrior with mystical supernatural powers, noted as well for his wisdom and generosity.

Quirky Italian baby name that works for any gender.

Floral, bright, and subtly powerful, Gaia is a name with two separate origins. In Greek mythology, it is the name of the earth goddess and the universal mother, who takes her epithet from the Ancient Greek word for land or ground. It was this ecological element that led actress Emma Thompson to choose it for her daughter back in 1999, and it could hold similar appeal to green minded parents today.

In the ancient Hindu religion, Indra is the warrior god of sky and rain, though in modern America, this might make a better girls' than boys' name. You can spell it Indre, like the French river, if you prefer.

Quintessentially common last name makes distinctive if problematic first, given to nearly 100 babies in the US in the most recent year counted.

A name of multiple identities: a somewhat soap-operatic single-syllable surname, a homonym for the biblical bad boy Cain, and, when found in Japan and Hawaii, it transforms into the two syllable KA-neh. Kane also has multiple meanings: in Welsh, it's "beautiful"; in Japanese, "golden"; and in Hawaiian, "man of the Eastern sky."

A lively boys' name that works well for girls.

Lincoln cracked the Top 50 for boys' names for the first time in 2016, more than 150 years after the death of its most famous bearer. This is especially remarkable because, as crazy as it seems now, Lincoln was deeply out of fashion as recently as the late 90s, consistently hovering near the bottom of the Top 1000.