The name Cadbury is derived from Cada's byrig; byrig is the Anglo-Saxon word meaning fort or town, which is frequently, but not exclusively, used to refer to hill-forts. It is one of three sites in Somerset to include the Cadbury name, the others being Cadbury Castle, near South Cadbury and Cadbury Hill which is also known as Cadbury-Congresbury to distinguish it from the other sites.