Kobra is the name of a DC supervillain. Having a family name myself, it's either one name. Or a jr, III, IV, situation most of the time. Actually his got two inspirations. There's a mystery novel from the 20's where a masked vigilante is murdering crooks on an English manor estate with a bow who calls himself the Green Archer (also the title of the book), written by the guy who created King Kong. His visuals are based on Douglas Fairbanks and Errol Flynn as Robin hood (especially the bronze age suit).