 Eadbald had a sister , Æthelburg , who was probably also the child of Bertha . Æthelburg married Edwin , King of Northumbria , one of the dominant Anglo @-@ Saxon kings of the seventh century . It is possible that there was another brother , named Æthelwald : the evidence for this is a papal letter to Justus , archbishop of Canterbury from 619 to 625 , in which a king named Aduluald is referred to , and who is apparently different from <unk> , which refers to Eadbald . There is no agreement among modern scholars on how to interpret this : " Aduluald " might be intended as a representation of " Æthelwald " , and hence this may be an indication of another king , perhaps a subking of west Kent ; or it may be merely a scribal error which should be read as referring to Eadbald . 
