Folke the Fat according to Gesta Danorum

Gesta Danorum

Gesta Danorum is a patriotic work of Danish history, by the 12th century author Saxo Grammaticus . It is the most ambitious literary undertaking of medieval Denmark and is an essential source for the nation's early history...

by the 12th century Danish chronicler Saxo Grammaticus

Saxo Grammaticus

Saxo Grammaticus also known as Saxo cognomine Longus was a Danish historian, thought to have been a secular clerk or secretary to Absalon, Archbishop of Lund, foremost advisor to Valdemar I of Denmark. He is the author of the first full history of Denmark.- Life :The Jutland Chronicle gives...

, was the most powerful man in Sweden

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 around 1100. He married Ingrid Knutsdotter, daughter of the Danish king Canute IV of Denmark

Canute IV of Denmark

Canute IV, later known as Canute the Holy or Canute the Saint , was King of Denmark from 1080 until 1086. Canute was an ambitious king who sought to strengthen the Danish monarchy, devotedly supported the Roman Catholic Church, and had designs on the English throne. Slain by rebels in 1086, he was...

 who was murdered in 1086. Folke and Ingrid had the sons Knut and Benedict

Bengt Snivil

Bengt Snivil from the House of Bjelbo was a Swedish magnate in mid-12th century.Some more or less romantic later literature has given him the title of jarl, although no proper historical source attests to such...

 according to Saxo. The chronicler furthermore reports that Folke was the paternal grandfather of Birger Brosa

Birger Brosa

Birger Brosa , jarl of Sweden 1174-1202, d. 9 January 1202 on Visingsö, was a son of Bengt Snivil and a member of the powerful House of Bjälbo...

, who still was alive at the time he wrote.