Teffont is a civil parish in the south of Wiltshire, England, consisting of the villages of Teffont Magna and Teffont Evias. It is in the Nadder valley, north of the river, about 10 miles (16 km) west of Salisbury. The parish was created in 1934 by combining the two Teffonts. The population taken at the 2011 census was 248.

Æthelbald was King of Wessex from 855 or 858 to 860. He was the second of five sons of King Æthelwulf. In 850, Æthelbald's elder brother Æthelstan defeated the Vikings in the first recorded sea battle in English history, but he is not recorded afterwards and probably died in the early 850s. The next year Æthelwulf and Æthelbald inflicted another defeat on the Vikings at the Battle of Aclea. In 855, Æthelwulf went on pilgrimage to Rome and appointed Æthelbald King of Wessex, while Æthelberht, the next oldest son, became King of Kent, which had been conquered by Wessex thirty years earlier.