Friday The name Friday comes from Frigedæg (Old English), and its meaning is Frige's Day — in honor of Freya, wife of Odin the Almighty, and stepmother of the god of thunder, Thor, also goddess of fertility, union, love and a very powerful warrior, who before becoming Odin's wife, was one of the Valkyries. She is associated with Venus, the Roman goddess of love, beauty and fertility.