Rendlesham is mention as a Royal Vill by Bede in a Northumbrian monk writing in the 8th century AD in his Historia Ecclesiastica Gentis Anglorum:
“Swithelm, the son of Seaxbald, was successor to Sigeberht. He was baptized by Cedd in East Anglia, in the royal village called Rendlesham, that is, the residence of Rendil. King Aethelwold of East Anglia, the brother of King Anna, the previous king of the East Angles, was his sponsor.”
The Christening described by Bede probably took place in c. AD 660.