Source: Action Comics #107 (1947)
Who's J. Wilbur Wolfingham?
Who's This? The W.C. Fields-looking mo-fo on page 11 of Who's Who vol.XII, a character deemed controversial by fans for his inclusion. Oh fans, you're mean.
How you could have heard of him: There's an E. Wilbur Wolfingham in the A.Bizarro mini-series, also a con man. I guess he's the Earth-1/post-Crisis version of the character.
Example story: Action Comics #107 (1947), the story handily reprinted in the Superman in the Forties collection
Who else? Well, that lacked martial arts, Who's Who vol.XII's bread and butter. So back to martial arts in our next edition.