Alvaldi (also ÃÂlvaldi; Old Norse 'all-powerful') is a jötunn in Norse mythology, presented as the father of ÃÂjazi. Saturn's moon Alvaldi is named after him.
The Old Norse name Alvadi means 'all-powerful'. The name ÃÂlvadi, found in Skáldskaparmál, appears to be a variant form referring to the same character.
In Hárbarðsljóð (Lay of Hárbarðr), Alvadi is mentioned as the father of the jötunn ÃÂjazi.
In Skáldskaparmál (Language of Poetry), he is named ÃÂlvadi and portrayed as the father of ÃÂjazi, Gangr and Iði. Described as "very rich in gold", ÃÂlvadi divides the inheritance among his sons in such a way that each may take the same mouthful of gold. According to philologist Rudolf Simek, the story is probably the remnant of an old myth.