Who's This? The Native American on page 17 of Who's Who vol. XXII.
How you could have heard of him: I do not believe Strong Bow has any post-Crisis appearances.
Example story: "Giant of the Badlands!" in All-Star Western #70 (1953) by Robert Kanigher and Frank Giacoia
DC has done a number of western books since the 50s, but Strong Bow never appeared in them, nor could he. He's trapped in a time before the white man, and the white man era dominates most western comics. I wouldn't mind seeing a modern take on the strip though, if only for variety's sake.
Who else? I skipped over Sterling Silversmith who, though obscure enough, is a Batman villain, so never THAT obscure. No, we're moving ahead to a character so obscure, it's a wonder he made it into Who's Who at all. Especially since they couldn't actually tell his story anymore...