Ivar the Boneless

Ivar the Boneless (born in 800s–c. 873), also known as Ivar Ragnarsson, was a semi-legendary Viking leader who invaded England and Ireland. According to the Tale of Ragnar Lodbrok, he was the son of Ragnar Loðbrok and his wife Aslaug. His brothers included Björn Ironside, Hvitserk, Sigurd Snake-in-the-Eye and Ubba. Ivar is probably the same person as Ímar.