masc. proper name, from Old English Ead-wine, literally "prosperity-friend, friend of riches," from ead "wealth, prosperity, joy" (see Edith) + wine "friend, protector" (related to winnan "to strive, struggle, fight;" see win (v.)).
fem. proper name, Old English Eadgyð, from ead "riches, prosperity, good fortune, happiness" + guð "war." A fairly common name; it survived through the Middle Ages, probably on the popularity of St. Eadgyð of Wilton (962-84, abbess, daughter of King Edgar of England), fell from favor 16c., was revived in fashion late 19c. Old English ead (also in eadig "wealthy, prosperous, fortunate, happy, blessed; perfect;" eadnes "inner peace, ease, joy, prosperity") became Middle English edy, eadi "rich, wealthy; costly, expensive; happy, blessed," but was ousted by happy. Late Old English, in its grab-bag of alliterative pairings, had edye men and arme "rich men and poor."
"be victorious," c. 1300 fusion of Old English winnan "to labor, toil, struggle for, work at, strive, fight," and gewinnan "to gain or succeed by struggling, conquer, obtain," both from Proto-Germanic *wennanan "to seek to gain" (source also of Old Saxon winnan, Old Norse vinna, Old Frisian winna, Dutch winnen "to gain, win," Danish vinde "to win," Old High German winnan "to strive, struggle, fight," German gewinnen "to gain, win," Gothic gawinnen "to suffer, toil"), from PIE root *wen- (1) "to desire, strive for."
Related: Won; winning. Meaning "gain the affection or esteem of" is from c. 1600. Breadwinner preserves the sense of "toil" in Old English winnan. Phrase you can't win them all (1954) first attested in Raymond Chandler. Winningest is attested by 1804.
<a href="https://www.etymonline.com/word/Edwin">Etymology of Edwin by etymonline</a>
Harper, D. (n.d.). Etymology of Edwin. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Edwin