1674: Early Anglo-Saxon Naming Trends Jul 15, 2019

Before the Norman colonization of England, most kings' names had begun with either 'Æthel' or 'Ed-'. This is because in this naming culture, compounds were extremely common, but also semantically significant. 'Æthel-' for instance means 'noble' in Old English, so it should not be surprising that so many of the nobility had such an element in their names, though the latter half varied quite a bit, such as the kings 'Æthelbald', 'Æthelbert', 'Æthelstan', and Æthelwolf'. As for 'Ed-' (or 'Ead-') this means 'wealth' so in names like 'Eadweard' (Edward meaning 'wealth guard') this was common, and featured the names of the Anglo-Saxon kings 'Edmund', 'Edred', 'Eadwig' 'Edgar' and 'Edward'. The vast majority of Ango-Saxons kings of England had one of these two elements.
See more on this here: about too many King Edwards