Ivar the Boneless was the brother of which 9th century Viking chieftain?
Ivar the Boneless Ivar the Boneless (Old Norse: "Ívarr hinn Beinlausi" ; ) was a Viking leader and a commander who invaded what is now England. According to the "Tale of Ragnar Lodbrok", he was the son of Ragnar Lodbrok and Aslaug. His brothers included Björn Ironside, Halfdan Ragnarsson, Hvitserk, Sigurd Snake-in-the-Eye and Ubba.
Haakon V of Norway Haakon V Magnusson (10 April 1270 - 8 May 1319) (Old Norse: "Hákon Magnússon"; Norwegian: "Håkon Magnusson") was king of Norway from 1299 until 1319.