Offa's son, was made king of the Mercians by his father in 787, presumably to give him experience and ensure his succession. In the event, when his father died in 796, Ecgfrith lasted only 141 days, dying in December. The circumstances of his death are unknown but the timing must arouse suspicion. Negotiations for marriage to a daughter of Charlemagne, begun c.789, had broken down, and no queen is reported. The existence of coins struck in the name of his mother, Cynethryth, and her witness to Ecgfrith's charters, confirm that she was a power in the land before and after Offa's death.
Subjects: British History.