Reading up about the battle of Cynuit Ubba’s (Ubbe) name is given as Ragnarson.
In your books he and his siblings are Lothbrokson. and they say Odda was the one who killed him.  Did you tweek history a bit to fit the story in this regard.? But why the name change – who is correct?
Do you actually write the novels on your own or do you have a team helping you. It’s mind boggling the amount of excellent work you have done that has brought such pleasure to so many people. Thank you Mr. Cornwell.
Jessica