For example, the song "Man of the Hour" apparently deals with the fate of the Swedish 17th century warship Kronan, the lyrics of "Mountain Men" bear a strong resemblance to the Engelbrekt rebellion, and "Boiling Led" appears to be about the assassination of Sverker I of Sweden.
According to a medieval genealogy, Boleslaw and Kol were sons of King Sverker I's son John, but a notice in a Danish source claims Sverker also had son named Boleslaw.
After killing Charles Sverkerson in 1167, Canute, who had just returned home after ten years in exile, started fighting for power against Sverker the Elder's sons Kol and Boleslaw Sverkerson.
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He made poems for nine powerful men, including the Swedish jarls Sone Ivarsson (c. 1107), Karl Sönason (c. 1137) and for the Swedish kings Sverker I of Sweden (c. 1150) and Jon Jarl.