text: Sources for this period in Kentish history include the Ecclesiastical History of the English People, written in 731 by Bede, a Northumbrian monk. Bede was interested primarily in England's Christianization. Since Æthelberht was the first Anglo-Saxon king to convert to Christianity, Bede provides more substantial information about him than about any earlier king. One of Bede's correspondents was Albinus, abbot of the monastery of St. Peter and St. Paul (subsequently renamed St. Augustine's) in Canterbury. The Anglo-Saxon Chronicle, a collection of annals assembled  in the kingdom of Wessex, mentions several events in Kent during Æthelberht's reign. Further mention of events in Kent occurs in the late sixth century history of the Franks by Gregory of Tours. This is the earliest surviving source to mention any Anglo-Saxon kingdom. Some of Pope Gregory the Great's letters concern the mission of St. Augustine to Kent in 597; these letters also mention the state of Kent and its relationships with neighbours. Other sources include regnal lists of the kings of Kent and early charters (land grants by kings to their followers or to the church). Although no originals survive from Æthelberht's reign, later copies exist. A law code from Æthelberht's reign also survives.
  Ancestry, accession and chronology
  According to Bede, Æthelberht was descended directly from Hengist. Bede gives the line of descent as follows: "Ethelbert was son of Irminric, son of Octa, and after his grandfather Oeric, surnamed Oisc, the kings of the Kentish folk are commonly known as Oiscings. The father of Oeric was Hengist." An alternative form of this genealogy, found in the Historia Brittonum among other places, reverses the position of Octa and Oisc in the lineage. The first of these names that can be placed historically with reasonable confidence is Æthelberht's father, whose name now usually is spelled Eormenric. The only direct written reference to Eormenric is in Kentish genealogies, but Gregory of Tours does mention that Æthelberht's father was the king of Kent, though Gregory gives no date. Eormenric's name provides a hint of connections to the kingdom of the Franks, across the English channel; the element "Eormen" was rare in names of the Anglo-Saxon aristocracy, but much more common among Frankish nobles. One other member of Æthelberht's family is known: his sister, Ricole, who is recorded by both Bede and the Anglo-Saxon Chronicle as the mother of Sæberht, king of the East Saxons (i.e., Essex).