 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 . 
