Ivar the Boneless had a brother who held what position in the mid-ninth-century?
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.
Agilbert Agilbert (floruit circa 650–680) was the second bishop of the West Saxon kingdom and later bishop of Paris. Son of a Neustrian noble named Betto, he was a first cousin of Audoin and related to the Faronids and Agilolfings, and less certainly to the Merovingians. His name, the Frankish language equivalent of Æthelberht, has been taken to suggest a link with the royal family of the Kingdom of Kent.