I question whether gyo means war in the Old English name Eadgyo. I believe the name Eadgyth is more closely related to the Old Norse name Gytha and Gyoa. (You can check behindthename.com for the origin these names)Since the Anglo Saxons of England originally migrated from the Old Norse lands that we know today as Denmark, Norway, Sweden, Belgium and Holland; I believe it is more likely that this name Eadgyth is related to Gytha, which does not mean war, it means “god” and “beautiful”.Sometime during the past millennia there was a confusion in translation between gyo and Gyoa.