For 10 points, give this name shared by many English kings, including one who named Lady Jane Grey as his heir.
One king by this name was killed at Corfe Castle while inebriated on mead, while another presided over the Battle of Tettenhall, a resounding Northumbrian Dane defeat. In addition to "the Martyr" and "the Elder" kings of this name, another, who was the step-uncle of William I, was canonized as "the Confessor". The Black Prince had this name, which was also the first name of a king known as Longshanks. For 10 points, give this name shared by many English kings, including one who named Lady Jane Grey as his heir.
One king by this name was killed at Corfe Castle while inebriated on mead, while another presided over the Battle of Tettenhall, a resounding Northumbrian Dane defeat.
{Edward}