Origin of the name ETHELBERT.
Etymology of the
Meaning of the baby name ETHELBERT.
same as of Anglo-Saxon Æðelbert
(q.v.), meaning "nobly
bright." (History of Christian Names, Yonge, 1884).
ST., king of the East Angles. He is known to history as one
of the victims of the aggressive policy of king Offa of Mercia...
William of Malmesbury says that Ethelbert was treacherously
allured by Offa, and killed within the precincts of the palace, having
been enticed thither in hope of becoming Offa's son-in-law. (A
Dictionary of Christian Biography, Smith, 1880)