Inge I
Around 1100, Folke the Fat became the first known Bjelbo jarl, and probably the first jarl of all Sweden, under king Inge I of Sweden. He was married to a daughter of king Canute IV of Denmark. According to legends, he was the first of his family so elevated. Nothing is known of any of Folke's collateral relatives, though it is well-established that several of his sons' descendants were important lords.