Declan is the Anglicized form of the Irish name Deaglán. St. Declan was one of the first missionaries to bring Christianity to Ireland, preceding St. Patrick. Originally from Wales, he founded the monastery of Ardmore in Ireland.

Though closely associated with the great medieval Florentine poet Dante Alighieri -- who's so famous most people skip the last name -- it's not as much of a one-man name as you might think. Heck, it's not even a one-poet name, thanks to British pre-Rapahaelite Dante Gabriel Rosetti. Though especially well used in the Italian-American community, it would make a striking name for any little boy.

David is an enduring worldwide classic, used from ancient times to the present day.

The Dorians were an ancient Greek tribe, one of the three major pre-Spartan tribes. It literally means "of Doris," a Greek district, or "of Doros," referring to the son of Helen of Sparta. Dorian derives from the Greek doron, meaning "gift," along with related names such as Dorothy and Dora.

Dylan still feels poetic and romantic after years of popularity. It still ranks highly on the charts, among the top boy names starting with D, so if you choose it, be aware that yours may not be the only Dylan in his class.

Dean may sound to some like a retro surfer boy name, but it is once again climbing up the popularity chart in the USA. For decades it was associated with Dean (born Dino) Martin; more recent representatives include Dean Cain, Dean McDermott and Dean Koontz -- not to mention Jared Padalecki's dreamy Dean Forester in Gilmore Girls.

Dawson was scarcely heard as a first name before the debut of Dawson's Creek in 1998, at which point it leaped up more than 550 places in one year. The character Dawson Leery, played by James Van Der Beek, was a teen favorite until the show's demise in 2003.

Although it has come to sound Irish, Dennis is one of the most widely-used French names (St. Denis is the patron saint of France) and harks back even further to Dionysius, the Greek god of wine and debauchery. It was introduced to England by the Normans.

Drew, which projects a polished, somewhat intellectual impression, is rapidly becoming the Andrew nickname of choice, replacing the past favorite, Andy. It is fully capable of standing on its own, which it has for many decades, non-stop since 1942.

While John Wayne and Duke Ellington are worthy role models, the reason Duke is currently enjoying a revival and returned to the Top 1000 in 2013 as one of the year's fastest-rising boys’ names is more likely due to the name given to high-profile TV couple Giuliana and Bill Rancic. Christened Edward Duke, he has always been called by his middle name, just as Edward Duke Ellington was. Duke is just one of several aristocratic titles being increasingly used by ordinary citizens.

Desmond is a sophisticated and debonair name, with noble ties to 1984 Nobel Peace Prize-winning Bishop Desmond Tutu, and with some great nicknames: Des/Dez, Desi/Dezi.

Douglas, and more particularly its nickname, Doug, had a real romantic swagger in the 1950s and 1960s dating back to swashbuckling Douglas Fairbanks, but today is more likely to conjure up your mom's prom date. Originally a Celtic river name, it became attached to a powerful Scottish clan, renowned for their strength and courage. In its earliest incarnation, Douglas was used equally for girls and boys.

The ultimate Jane Austen hero name, Darcy makes a handsome, surname style choice. Predominantly used for girls in England and Wales, across the pond in Australia, it is a stylish Top 100 name for boys. In the US meanwhile, it does lean feminine, however, 30 boys were given the name in a recent year, suggesting it is on the up across the board.

Duncan is jaunty, confident, and open, a Scottish royal name that's brimming with friendly charm and makes it into our golden circle of names that are neither too popular nor too strange. Popularity aside, Duncan is one of the most classic Scottish names for boys.

Dashiell, though missing from many other name sources, is among the hottest new names, chosen by such celebs as Cate Blanchett and author Helen (Bridget Jones) Fielding. With its great dash and panache, Dashiell is associated with detective writer Dashiell Hammett (born Samuel, as in Sam Spade, Dashiell being his mother's maiden name). Alice Cooper was ahead of the game: He named his son Dashiell in 1985.

Converting Damian to Damien – or Julian to Julien or Lucian to Lucien – adds a certain je ne sais quoi to names. But most people in English speaking areas will still pronounce this the same as the -an ending form. The French pronunciation is more like "dah-mee-u(n)".

Derek started out as a sophisticated Brit, but the name became so common over the last decades of the twentieth century that it lost much of its English accent, along with its stylish edge. Derek was a Top 100 name in the U.S. for 25 years, from 1970 to 1995, after which it began to decline.

Dimitri is a Slavic variation of the Russian Dmitriy, a name that comes from the Greek Demetrius. Demetrius was derived from Demeter, the name of the Greek goddess of fertility and farming. Among the possible spelling variations are Dmitri, Dmitrii, Dmitriy, and Dmitry.

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.

Darius is a historic name via Emperor Darius the Great, a key figure in ancient Persian history, and several other Persian kings. His name today has an appealingly artistic image, which might well be found on a concert program or gallery announcement.