Sif

Sif was the Norse goddess of the harvest. She was known for her long golden hair. Loki once chopped it all off as a prank and Sif got so sad to a point that there was no harvest. Her Husband Thor then demanded a replica be made by the Sons of Ivaldi. Sif was not a warrior goddess at all. Her brother is Heimdall.

Marvel's Sif
 In Marvel Sif is a warrior goddess and she weilds a flying sword enchanted by Odin. She was the asgardian goddess of war and the hunt, Her hair was black and her eyes blue. No long golden blonde hair at all. Sif and Thor fell in love when they were little kids.