[Rune Son of Bjarne]

I dont know when midgarð was first written, but it is assumed to have been used atleast since the 5th century. . . anyway The first reports of viking raids is in 787 and
middangeard is first used in 750. Given the little time in between the incedents and the fact that middangeard is used in Beowulf, clearly shows me that it is the same word.