Granmar was a king of Södermanland, in Snorri Sturluson's Heimskringla. The same king also appears in the Volsunga saga. Granmar was married to Hilda, the daughter of the Geatish king Högne of East Götaland, and his son-in-law was the seaking Hjörvard of the Ylfings as he was married to Hildagun. These three kings defended themselves against the Swedish king Ingjald Ill-ruler. According to the Heimskringla, he had no sons, but the legends of Helgi Hundingsbane relate that he had the sons Hothbrodd, Gudmund and Starkad who were slain by Helgi. Snorri relates that when the Swedish king Ingjald ill-ruler invited seven petty kings in order to burn them all to death inside his hall, Granmar did not arrive and so he escaped being murdered. The same summer, the Sea-king Hjörvard of the Ylfings arrived at Myrkva Fjord (Mörköfjärden, an inlet that is still used to pass between Mälaren and the Baltic Sea and divides Södermanland in two parts). Hjörvard was invited to a feast with Granmar and he agreed as he had never pillaged in the area before. He was gladly welcomed and the kings sat with one woman each as was the custom, while the others formed a single group. Hjörvard's Vikings did not like that as it was their law that everyone at a feast should drink together. Hjörvard then sat in a high seat opposing Granmar and his men sat on the same bench as him. Granmar's daughter Hildigunn, who was very beautiful, was told by her father to serve beer to the men. She took a silver goblet, filled it and bowed to Hjörvard, telling him success to all Ylfings, this cup is to the memory of Hrólf Kraki drank half of it and offered the rest to Hjörvard. He drank it, took her hand and asked her to sit beside him. She answered that it was not Viking custom, but he asked her not to mind. This evening they drank and talked a great deal with each other, and the next day, as he was leaving, Hjörvard asked for her hand. Granmar asked his wife, Queen Hilda and the people he respected, telling them to trust Hjörvard. They all agreed. There was a wedding and as Granmar had no sons, Hjörvard stayed to help Granmar defend his kingdom. In the autumn, Ingjald assembled his forces in order to attack Södermanland. However, when Granmar and Hjörvard