"Friday" means "day of Frigga." She was a Norse goddess and mother of Baldur. At Baldur's birth, she made everything in her kingdom swear not to hurt Baldur. She forgot to make the mistletoe take this pledge, however, and that was Baldur's undoing.
Odin (Alfadir) : " Worship of Odin may date to Proto-Germanic paganism. The Roman historian Tacitus may refer to Odin when he talks of Mercury. The reason is that, like Mercury, Odin was regarded as Psychopompos, "guide of souls".