Who's This? The top half of page 23 in Who's Who vol.XI.
How you could have heard of him: As you might expect, only fervent Golden Age lovers ever dared putting the Jester in their comics. Roy Thomas gave him a couple of cameos in All-Star Squadron, and James Robinson had him appear in Starman #46 and the Golden Age mini-series. Chuck Lane appeared more recently in Palmiotti and Gray's Freedom Fighters as the aged leader of the Arcadians, a group of patriotic radicals looking to cleanse U.S. governments of corruption. His son Charles, as a new Jester, tangles with Freedom Fighters and is killed. Not the best of legacies.
Example story: Smash Comics #44 (1943) by Jester creator Paul Gustavson
Though the Jester is not very present in the DCU, his name HAS resonated with readers, at least if I look to role-playing campaigns in the DC Universe! In the Who's Who Podcast these pieces are companions to, Shag has said HIS group had a hero called the Jester. And mine did too! My player Bass had mashed-up the Flash and the Joker (lightning+Joker venom = super-speed and laughs) and called him the Jester. Proof:
Who else? We're hitting the Johnnies section of that issue of Who's Who and only one of them in my opinion, warrants exploration.