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.

Thor, the powerful name of the Norse god of thunder, strength and rain, would make a bold statement. Long a comic book staple, Thor has now invaded the big screen, and could land on birth certificates as well.

Brenna is a feminine form of the Irish surname Brennan, or perhaps a variation of Brenda or Brendan—all of which have different meanings. Whatever its derivation or authenticity, it's a modern sounding name which has steadily decreased in popularity since 1995 when it peaked at Number 235 in the United States.

Frey is the handsome Norse fertility god, a worthy namesake. Frey remains rare in the US even as the similar Freya picks up in popularity.

This royal Danish name has long been used across Scandinavia, Germany and Slavic countries and somewhat in the US around the turn of the last century --it was #622 in 1888. There were two notable silent screen stars named Dagmar, one with Polish, the other with Danish roots.

Also spelled Sigfrid, this hefty German name has an appropriately majestic meaning: "victorious peace". Fittingly, a famous bearer was the English World War I poet and pacifist Siegfried Sassoon. Sassoon was named after the hero of a Wagner opera, which in turn was based on a tragic hero from German legend.

Gray-bearded name heard primarily in Sweden and Germany.

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.

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.

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.

The ancient German name Adelheidis gave rise to both Adelaide and Adelheid. While Adelaide is more popular and better known internationally, Adelheid is still used occasionally in Germany, the Netherlands, and Scandinavia. The German pronunciation is not that different from Adelaide, with a soft h and a long I sound instead of a long A in the last syllable.

A key figure in Norse legend and a traditional Scandinavian favorite making inroads here.

Signy — also spelled Signe — would make another distinctively offbeat alternative to Sydney. Signy appears in Norse mythology as the twin sister of Sigmund.

Rainer is one of those baby names that is still under-the-radar but has been quietly gaining traction: The number of boys who've received the name has doubled in the past decade, to just under 50. Part nature name and part traditional German name for boys, Rainer can claim a place among the two-syllable r-ending baby names so fashionable for boys today.

A medieval German saint's name which remained popular in Germany until the middle of the 20th century. It is still in relatively wide use in other European countries, including Poland and Hungary. With other Bert names – like Robert and Albert and even Gilbert – appealing to lovers of strong, traditional boy names with a slightly clunky charm, Norbert could be one of those so-out-it's-in choices that everyone knows, but almost no one is using.

An ancient German saint's name – and most famously the name of Harry Potter's snowy owl – but the combination of "head" plus "wig" feels a little too literal in English.

One of the most popular names in Scandinavia, Freja--or Freyja--was a major deity of Norse paganism. Beautiful, blonde and blue-eyed, she was the goddess of love, beauty and fertility. In the US, the name is most likely spelled Freya.

This, like many Norse and Scandinavian names, remains icebound, though with the unexpected rise of such ancient Scandinavian mythology names as Odin, Thor, and Freya, we may see Haldor rise again.

Shades of Thurston Howell, the effete millionaire castaway on Gilligan's Island.

This old Norse name is still used in contemporary Scandinavia. An ancient hero's name, Sigurd got a modern boost from a heroic figure in television's The Vikings.