On 24th April 767 Archbishop Æthelbert of York was consecrated Archbishop of York.
Anglo-Saxon Chronicle. 768. This year died Archbishop Egbert at York, on the thirteenth day before the calends of December, who was bishop thirty-six winters; and Frithbert at Hexham, who was bishop there thirty-four winters. Ethelbert was consecrated to York, and Elmund to Hexham.
Anglo-Saxon Chronicle. 776. This year died Bishop Petwin, on the thirteenth day [18th September 776] before the calends of October, having been bishop fourteen winters. The same year Ethelbert was consecrated Bishop of Whitern, at York, on the seventeenth day before the calends of July.
On 14th June 776 Archbishop Æthelbert of York was consecrated Bishop of Whithorn aka Galloway.
Anglo-Saxon Chronicle. [8th November 780]. The same year Archbishop Ethelbert died at York, and Eanbald was consecrated in his stead;
On 8th November 780 Archbishop Æthelbert of York died.