Originally Posted by Vartha
Those funky shapeshifting Frost Giants.
I don't know how many books back then were actually in print of the Norse myths, so, in the creators defense it could be one of those things where they used books that were wrong or different too.
Heck even my versions of the translated myths have very little on Loki's parents, like there's very little background on Sif.
That may be true. But Stan Lee himself has admitted that they just made a lot of stuff up back then without any research. Why do you think so many characters' origins basically break down to "something happened with radiation"?