Though to most Americans Viggo is a one-person name attached to intense actor Mortensen, it is actually an old Norse name dating back to the Vikings, and is currently the 32nd most popular appellation in Sweden. Viggo Mortensen is a Jr., sharing his name with his Danish father.

Calix is once-obscure name that is starting to see some use in the US, where 62 baby boys were named Calix in 2024. An indirect influence is the actress Calista Flockhart, who introduced Americans to the female version of this attractive Greek name to prominence.

This name is a classic example of an underused golden oldie that ticks so many boxes - unusual yet traditional, heaps of cute nicknames, a statement name that exudes retro cool. Aloysius is the Latin form of many more common names like Louis, Luis, Luigi and the uncommon but symphonically familiar Ludwig.

Wolfgang Amadeus Mozart's middle name could make an interesting pick for music-loving parents--if only in middle place. Amadeus is the title of a Peter Shaffer play which became an award-winning film in 1984.

This Roman Emperor's name has long been considered too grand for an American boy. But in this era of children named Augustine and Atticus, it just may be prime for an unlikely comeback.

Now that such Old Testament patriarchs as Elijah and Moses fill the playground, Boaz seems downright baby-friendly, having more pizzazz than many of the others, perhaps as a successor to Noah.

Finnian is a fair jig of a name, energetic and easy on the ear. Finnian (and brother Finian) is also familiar in its alternate spelling through the classic 1968 Broadway musical Finian's Rainbow, later made into a film starring Fred Astaire as Finian McLonergan.

Haunting biblical and Civil War place-name; now unisex—especially after the mega-high-profile Brangelina couple picked it for their daughter. It debuted in the Top 1000 for boys in 2015.

A common surname that was popular as a given name in the late 19th and early 20th century, Willis dropped off the US Top 1000 back in the early 90s, just as alternative William diminutive, Liam, began to skyrocket.

A variant form of Laurence or Lawrence which ranked in the #200s in the US from the 1900s through to the 1960s. It didn't fall off the boys' Top 1000 until the late 1990s, following the huge popularity of Lauren for girls.

Though forever tied to Huck, short for Huckleberry, Finn, this is an undeniably cute short form that may have some life as part of the hipster taste for names like Duke and Bix.

Joachim is an undiscovered biblical name with potential, although most modern parents would probably prefer the more lively Spanish version, Joaquin. Like many Old Testament names, it was primarily in use in the seventeenth century, and then became rare. In the Bible Joachim is a king of Judah; according to the Gospel of James, Saint Joachim was the husband of Saint Anne and the father of the Virgin Mary.
br/>Currently well-used in France, the name Joachim is known in countries and languages around the world and pronounced somewhat differently in each. While American might be most familiar with the Spanish version of the name, Joaquin via actor Joaquin Phoenix, that pronunciation wah-keen is not similar to any of the pronunciations of Joachim, which all have three syllables often with the emphasis on the second.

Macho to the max. But with the rise of x as a fashionable letter anywhere it appears in a name, ala Jaxson or Maxon, we may be hearing more of Axton.

Though Eoin is a Gaelic form of John, its Anglicized pronunciation links it directly to Owen. Eoin is currently a Top 30 name in Ireland. Other variations: Ewan, Ewen, Evan and Eoghan (pronounced as Owen but also translated as Eugene).

Once a popular choice in for boys in the Middle Ages and again during the 19th century, Aubrey has mostly been used for girls in the US since the 1970's. With its arty, surname-y, and sophisticated feel, however, it is rising up the UK charts for both boys and girls.

This evocative name of one of the Three Wise Men of the Orient, also spelled Balthasar, may finally be ready for prime time. Balthazar, Melchior and Caspar were the Magi who brought gifts of gold, frankincense and myrrh to the baby Jesus, though their names were not mentioned in the Bible.

Loki is the shape-shifting, gender-bending god of mischief in Norse mythology. Taking several animal forms, from a salmon to a seal to a fly, Loki is alternately friend and foe of the gods.

This rarely used New Testament name could make an unusual route to the cool nickname Nico. Borne by the person who helps to entomb Jesus following his crucifixion, it has the powerful meaning of "victory of the people" and is the Latinized form of the Ancient Greek Nikodemos.

Has a legitimate first name history in its native land and an appealing meaning, but pronunciation is far from obvious.

This lively Scottish surname is an anglicized form of the Gaelic Mac Coinnich, Coinnich being one of the original Gaelic forms of Kenneth.