Diesel, which you can think of as a word name for the fuel or as a German surname that derives from a pet form of Matthew or Mathias, is a new entry to the American name lexicon thanks to celebrities Jennie Finch and Casey Daigle, who chose it for their son, baby brother of Ace. Diesel might also be thought of as one of the neo-macho names, joining such bros as Harley, Ranger, and Breaker.

This old Cornish name took on a whole new identity via Denzel Washington, who has inspired several thousand namesakes. The actor was named after his father, who was named for a Dr. Denzel, who delivered him.

This presidential name is in style limbo today - or, some might say, in the the sweet spot of familiar but little-used.

Welsh heritage choice that's rare today even in its native land.

Dagger is one of the new badass baby names, a sharp and scary choice that some parents may feel arm their child for battle in a cruel modern world.

With Levi in vogue and country names on trend, Denim could fit in among the Waylons, Walkers, Coltons, and Rhetts. As a boys name, it brings to mind the qualities of the fabric: hardworking, cool and versatile. Singer Toni Braxton chose this name for her son in 2001, and parents have been using it for boys and girls ever since.

The most common form of Damir is of Slavic origins, deriving from the elements da, meaning "give" or "take," and mir, "peace." It's also seen as a variation of the Turkish name Demir, meaning "iron".

With the fashions for tree names, place names, and nickname names, Derry is a three-way winner.

An Irish surname possibility for those who like Daley, Royal, Dougal, and Dolan, though it may sound too much like doily to catch on for modern boys. Nevertheless, it was fairly well used in the 20th century, popular in the 30s, 40s, and 50s when it reached the Top 200 at one point.

Swaggering, cutting-edge choice equally appropriate for both genders. It's also very rare, given in the US in 2015 to only seven baby girls....and no recorded baby boys. Do you want to be the first?

Forever Lucy's.

Cheerful but laidback, surname-style Delaney is derived from the Old Irish name Dubhshláine and has become a familiar choice for girls in recent decades. Nevertheless, it has also been used for boys since the early 1900s and was equally - though rarely - given to both, right up until the 1990s.

Dijon is the capital city of the Burgundy region of eastern France, famed for its wine and yes, its mustard. As a first name, it's been brought to wider attention by a few prominent musicians and could grow in use.

Heard in the Scottish highlands, and much more in tune with the present times than the dated Douglas — for which it could make a perfect tribute name.
Dougal was the Scottish nickname for invading dark-haired Danish Vikings, just as Fingal was given to the blonder Norwegians.

Influencer Nara Smith called out Dusk as one of the names she likes but won't be using, which is probably the reason you're here. Dusk is a totally unique baby name, given to fewer than five children last year.

This tough and attractive name is popular in its native Bosnia and Turkey, though globally, it might be better known in the form of Timur.

A rising choice in the US, where money-related names are becoming more fashionable.

At one time associated with the fictional detective Bulldog Drummond, this formal surname name does boast the cute nickname Drum.

Although this month name was used only for girls in a recent year, there's no reason it can't work for both genders. For a holiday baby, more original than Noel and more universal than Christmas.