Ottar Jarl
Jarl Ottar or Ottar Jarl was a jarl of Götaland who appears in the Heimskringla and in the Jomsvikinga Saga.
The Jomsvikinga Saga tells that Ottar was the maternal grandfather of Palnetoke, the Jomsviking.
In the Heimskringla, Snorri Sturluson relates that Haakon Sigurdsson killed Jarl Ottar during an attack on Götaland for Harald Bluetooth.