Ivar Ragnvaldsson

Halfdan and his brothers are considered historical figures, although opinion regarding his supposed father is divided. According to Hilda Ellis Davidson, writing in 1979, "certain scholars in recent years have come to accept at least part of Ragnar's story as based on historical fact".[30] Katherine Holman, on the other hand, concludes that "although his sons are historical figures, there is no evidence that Ragnar himself ever lived, and he seems to be an amalgam of several different historical figures and pure literary invention."[31]https://en.wikipedia.org/wiki/Halfdan_Ragnarsson