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.
English, German, Dutch (De Mann), and Jewish (Ashkenazic): nickname for a fierce or strong man, or for a man contrasted with a boy, from Middle English, Middle High German, Middle Dutch man. In some cases it may have arisen as an occupational name for a servant, from the medieval use of the term to describe a person of inferior social status. The Jewish surname can be ornamental.