Why are the days named what they are?

well most days come from mythology. for example monday means lundi in french. lun means moon so monday got its name from, moon-day. in Norse mythology, tiw, wotan, thor and freya were all gods which led to tiws-day, wotans-day thors-day and freya-day. Saturn was one of the titans which led to saturns-day or Saturday and then of course Sunday came from the sun