From an Old English personal name derived from ēad ‘prosperity, riches’ + mund ‘protector’. It was borne by several early royal and saintly figures, including a 9th-century king of East Anglia killed by invading Danes, allegedly for his adherence to Christianity. In the 16th and 17th centuries, there was a good deal of interchange between Edmund and Edward.
German: from Middle High German gebel, gibel, meaning ‘gable’ but also ‘head’, ‘skull’, hence probably a name for someone living at a house with prominent gables or a nickname for someone with a large or otherwise remarkable head. The personal name Giebold or Geb(w)alt, from the stem geb- ‘gift’, may have been the origin in some instances.