does loki as odin's son truly marvel's invention?
in the norse mythology odin and loki is blood brothers, but most people today know loki is odin's adopted son from mcu but even before i know mcu, i got introduce the idea of loki as odin's son from the mask sequels (the awful one with the baby in it) and i found a reddit post about american gods book call loki as his son.
i just wonder did marvel comics truly invent the idea or not?