 According to Saxo Grammaticus, Ragnar raided Ireland, killing a king called Melbricus.This has been identified with a raid on Conaille Muirthemne in 831 in which the king Máel Brigte was abducted by Vikings.Turgesius has also been identified with a son of GuÞfriÞ or Gudfred, the Danish king who fought against Charlemagne between 804 and 810.