Þjazi was a giant, son of the giant Olvaldi, brother of giants Idi and Gangr, and the father of Skaði. He is most remembered for the kidnapping of Iðunn, a story told both in the Prose Edda and the Haustlöng. With Iðunn having been carried off by Þjazi in eagle form, the gods were deprived of her apples, and began to grow old and weak. However, Loki, by means of transforming Iðunn into a nut, managed to rescue her in a dangerous journey ending with the death by fire of Þjazi. His daughter, Skaði, travels to Asgard to seek retribution, and is pacified both by marriage to Njord and the transformation by Odin of the eyes of her father into stars in the night sky.
Image from 18th-century Icelandic manuscript “NKS 1867 4to”, courtesy of the Danish Royal Library.