What brother of Ivar the Boneless was a Viking warrior in the middle of the 9th Century?
Ivar the Boneless:  His brothers included Björn Ironside, Halfdan Ragnarsson, Hvitserk, Sigurd Snake-in-the-Eye and Ubba. Sigurd Snake-in-the-Eye: Sigurd Snake-in-the-eye (Old Norse: Sigurðr ormr í auga) was a Viking warrior in the middle of the 9th Century.
i don't know