Who's This? A western devil.
How you could have heard of him: The New52's All Star Western would also premiere El Diablo in its second issue, but only give him one more go. Nowadays, the name is associated with a member of the Suicide Squad. Thanks to the Justice League Unlimited episode that features western stars, a larger audience may be aware of him.
Example story: All-Star Western #3 (January 1971) "Call Him Satan - Call Him Saint!" by Robert Kanigher and Gray Morrow
In the category of continuity we don't need, in the letter column of Superman Family #188, editor E. Nelson Bridwell established that Lazarus Lane was an ancestor to both Superman's girlfriend Lois Lane and The Shadow's assistant Margo Lane. He was having fun with the readers, I think.
Who's Next? A villain Vigilante stole from Batman.