Who's This? The fashion nightmare who starts the Q's on page 2 of Who's Who vol. XIX.
How you could have heard of him: In the post-Crisis DCU, he's been used here and there as part of a larger group of C-listers - Manchester Black's in Adventures of Superman #608, a new SSSV in Infinite Crisis, and most famously, a patron of the supervillain bar who loses his equipment to Wally Tortolini in Justice League America #43. He's probably the Quakemaster who goes up against Hero Hotline (different look, but written by his creator Bob Rozakis too). His name was also used by the Ventriloquist in the Cataclysm storyline, the one with the big Gotham earthquake.
Example story: DC Special #28 (1977) by Bob Rozakis, John Calnan and Tex Blaisdell
Who else? We're heading for the Golden Age and a character that wasn't originally DC's.