Ivar Ragnarsson

Ivar the Boneless ( ; died ), also known as Ivar Ragnarsson, was a Viking leader who led invasions into England and Ireland. According to the Tale of Ragnarr Loðbrók, he was the son of Aslaug and her husband Ragnar Loðbrok, and was the brother of Björn Ironside, Halvdan (or Hvitserk), Sigurd Snake-in-the-Eye, and Ragnvald. However, it is not known whether this is historically accurate. Ivar is sometimes regarded as the same person as Ímar, a Viking king of Dublin between 870 and 873.

It is unclear why Ivar acquired the nickname "boneless". Some sagas claim that he was born with a skeletal condition which left him unable to walk, while others suggest that he was merely impotent.