Æthelberht was the King of Wessex from 860 until his death in 865. He was the third son of King Æthelwulf by his first wife, Osburh. Æthelberht was first recorded as a witness to a charter in 854. The
Æthelberht in the early fourteenth-century Genealogical Roll of the Kings of England
Charter S 331, which survives in its original form, dated 862. King Æthelberht granted land at Bromley in Kent to his minister Dryhtwald.
Coin of King Æthelberht dated c. 862
Memorial to Æthelbald ("ETHELBALD") and Æthelberht ("ETHELBERT") in Sherborne Abbey
Æthelred I was King of Wessex from 865 until his death in 871. He was the fourth of five sons of King Æthelwulf of Wessex, four of whom in turn became king. Æthelred succeeded his elder brother Æthelb
Æthelberht, King of Wessex
…a sub-king and Wessex and Kent were fully united for the first time. He appears to have been on good terms with his younger brothers, the future kings Æthelred I and Alfred the Great. The kingdom came under attack from Viking raids during his reign, but these were minor compared with the invasions after his…
Æthelred as depicted in the early fourteenth-century Genealogical Roll of the Kings of England
Charter S 332 dated 863 of King Æthelberht. Æthelred attests second from bottom on the left as "Æthelred fil[ius] reg[is]".
Charter S 338 dated 867. Æthelred, King of the West Saxons and the Men of Kent, grants Wighelm, priest, a seat in St Martin's Church, Canterbury, together with land. Most charters only survive as copies, and this is the only original of Æthelred to survive.
Silver penny of King Æthelberht of Wessex (Æthelred's predecessor)