This name found in both Celtic and Scandinavian mythology has gone from all-boy to almost all-girl, retaining a strong, unisex quality. However, it has dropped following its three-decade heyday from the 1960s to the 1990s.

A crystalline name that retains its loveliness far past its prime. Its biggest downside: Eternal confusion over spelling and pronunciation. Kristen? Kirsten? It can be so confusing that many parents today opt to bypass it.

Two drawbacks: some unpleasant World War II associations, and the Santa clause.

Sigrid is a distinctly Scandinavian name that is starting to edge out into the wider world, a la cousin Ingrid. Unfortunately, short form Siri is now off the table, but Sigrid is still a possibility.

Rollo is a livelier, roly-poly, o-ending version of Roland.

Short for Brunhilda, the operatic Valkyrie of Teutonic legend, Hilda still has not quite shaken off that image that image. Though with the resurgence of Matilda, she might just have a bit of a comeback.

The Elin variation makes an old favorite sleeker and more modern. Elin came to prominence via the ex-Mrs.Tiger Woods and is now perhaps best known via novelist Elin Hildebrand.. It entered the US Top 1000 in 2010, though it's now dropped off again.

A traditional Nordic name, Helga was extremely popular throughout Scandinavia in the 19th and early 20th centuries. In Germany, it was a Top 10 pick from 1924 to 1943. And it still ranks in the Icelandic Top 50 today.

Lars is a perfect candidate for a cross-cultural passport: it has been heard often enough here to sound familiar and friendly, yet retains the charisma of a charming foreigner.

The long history and solid usage of Henry has infiltrated other cultures, where a number of variations experience the same degree of popularity. In the US, Henrik first entered the Top 1000 in 2014. In Norway, Henrik is a mega popular choice.

An fearsome old Norse name with a long history in Scandinavia. It's gotten a boost in the States from popularity of the History Channel drama "Vikings," in which the protagonist is named Ragnar. Ragnar Lodbrok (meaning "shaggy pants") was a legendary warrior whose story was told in the Viking sagas. Ragnar also recalls name of the Norse Judgment Day, Ragnarök.

Thora, related to Thor, is the ancient Norse thunder goddess name that's much softer and gentler than its meaning suggests. A noted bearer is actress Thora Birch.

Apt name for a little drama queen with a long future ahead of her. Saga is a Top 30 girls' name in Sweden.

While the male Alva or Alvah relates directly to the minor Biblical character, the female version is more likely an Anglicized form of the Irish name Ailbhe, or a feminine form the name Alf (and Alf- beginning names), popular in its native Sweden and Norway. Best known as Thomas Edison's middle name, Alva has true unisex roots.

Manly almost to the point of macho.

Closer to the original Norse name Ívarr, it is part of a small group of names with similar roots: Ivor, Iver, Ivo, Ives, and Evander, which all make rugged yet gentle feeling choices. Used throughout Scandinavia, Ivar is in the Swedish Top 100 and is also on the rise in the UK, outranking the English variation, Ivor.

The name of a monstrous wolf in Norse legend, who kills the god Odin and is then killed himself by one of Odin’s sons. Harry Potter author J.K. Rowling used the name for one of her most terrifying characters: the evil werewolf Fenrir Greyback.

If you're looking for a name with Scandinavian roots, this would make a stronger and more appealing import than Dagmar. With its meaning of "new day," it could make an ideal choice for a girl born around New Year's.

One of the top baby names in Sweden, Tage is virtually unknown outside Scandinavia. Many English speakers would rhyme it with stage, but the correct pronunciation is two syllables with a hard G: TAH-gah.

The dynamic personality and paintings of Mexican artist Frida Kahlo have inspired growing numbers of parents to resurrect this form of the name. It does much better in certain European countries, especially in Denmark and Norway. The Frieda and Freida spellings were more popular in the US until the middle of the 20th century.