Who was the second husband of the sister of Ulf Tostesson?
Ulf Tostesson: Ulf Tostesson was a jarl and the son of the legendary Viking Skogul Toste. Ulf Tostesson:  He was the brother of Sigrid the Haughty, and his son, Ragnvald Ulfsson, a jarl, was the father of Stenkil, who was elected king when the old House of Munsö died out. Sigrid the Haughty: Sigrid the Haughty, also known as Sigríð Storråda, is a queen appearing in Norse sagas as wife, first of Eric the Victorious of Sweden, then Sweyn Forkbeard of Denmark.
Sweyn Forkbeard