Question: Who is the paternal grandfather of Knut Birgersson, Riksjarl Of Sweden?
Sentence (from "Knut Birgersson, Riksjarl of Sweden"): Sources are silent how and why Knut became jarl in Johan's lifetime, but either he got it as acompromise out of King Sverker, or Sverker actually needed an effective Riksjarl to his side.
Relevant evidence: No