EDGAR.  English.  Most often from Anglo-Saxon Eadgar (q.v.), meaning "happy spear," or "rich spear," but sometimes from Eadgard (q.v.), "keeper of his oath." (The Etymological Enchiridion, Harrison, 1823)."  Usage: America, Australia, Canada, England, Great Britain, Ireland, New Zealand, Scotland.

... Germanic Ortgar, happy spear, is identical with our familiar Eadgar, or Edgar.  This name, after being laid to rest with the Anglo-Saxon monarchy, came to life again with the taste for antiques; and Edgar Ravenswood, in his operatic character, has brought Edgar and Edgardo. (History of Christian Names, Yonge, 1884).