 Eadbald's influence over other Anglo-Saxon kingdoms was less than Æthelberht's. Eadbald's reduced power is apparent in his inability to restore Mellitus to the see of London: in Bede's words, his authority in Essex "was not so effective as that of his father". However, Kentish power was still sufficient to make alliance with Eadbald's relatives attractive to other kingdoms. Edwin's marriage to Eadbald's sister, Æthelburg, was probably also motivated by a desire to gain better access to communications with the continent. The relationship would have been valuable to Eadbald, too; it may have been as a result of this alliance that Edwin's overlordship of Britain did not include Kent. Another factor in Edwin's treatment of Kent may have been the location of the archbishopric in Canterbury: Edwin was well aware of the importance of Canterbury's metropolitan status, and at one time planned to make York an archbishopric too, with Paulinus as the planned first incumbent. Paulinus eventually returned to Kent, where at Eadbald's and Archbishop Honorius's request he became bishop of Rochester, and York was not made an archbishopric for another century. Within a year of Edwin's death in 633 or 634, Oswald took the throne of Northumbria, and it seems likely that his relations with Eadbald were modelled on Edwin's. Oswald's successor, Oswiu, married Eanflæd, who was Edwin's daughter and Eadbald's niece, thereby gaining both Deiran and Kentish connections.
