The Heimskringla on Ulf Uspakson
Heimskringla > part in the government with his brother Hardaknut. In the same autumn > 38. Of Ulf Uspakson.
attestation: Ulf Uspakson was highly esteemed by Harald for his understanding, eloquence, and bravery; Harald made him his marshal.
"Ulf Uspakson stood in great esteem with King Harald; for he was a man of great understanding, clever in conversation, active and brave, and withal true and sincere. King Harald made Ulf his marshal"
relationship: Ulf married Jorun, Thorberg's daughter and sister of Harald's wife Thora.
"married him to Jorun, Thorberg's daughter, a sister of Harald's wife, Thora."
relationship: Ulf and Jorun's children included Joan the Strong of Rasvol, whose descendants included Archbishop Eystein.
"Ulf and Jorun's children were Joan the Strong of Rasvol, and Brigida, mother of Sauda-Ulf, who was father of Peter Byrdar-Svein, father of Ulf Fly and Sigrid. Joan the Strong's son was Erlend Himalde, father of Archbishop Eystein and his brothers."