(d. 757), king of Mercia (716–57). In his time any member of an extended royal family had an accepted chance to capture the throne. This is the background to the young Æthelbald's being driven into exile in the reign of his second cousin Ceolred, and to his succeeding Ceolred as king. Bede
tells us something weighty about Æthelbald's success as king. Writing in 731 he says that all the kingdoms of the English, south of the Humber, are under the authority of Æthelbald. A charter of 736 describes Æthelbald in language which supports this claim, one terming him king of all the kingdoms of the South
English and even king of Britain
. His relations with the church were forceful. He seems to have established a firm exploitation of monasteries and he misconducted himself with nuns. He died at the hands of his own military household. Our fragments of knowledge suggest the creative authority of a mighty ruler.
Æthelbald (ĕ´thəlbôld, ă´–), d. 757, king of Mercia (716–57), grandson of a brother of Penda. He spent years in exile before he became king. A strong ruler, by 731 he controlled all England S of the Humber River and led expeditions into Northumbria (740) and against the Welsh (743). He was murdered by his bodyguard.