How many more times do I have to spell it out for you? This discussion is over. Unless you can find a canonical name for him, in scripts, promotional material, comics, or whatnot, he's not getting a page.
Then they're both mistaken. The one listed as being voiced by Bruce Timm, Top Hat Joker, in the credits of "Countdown" is the one our page is about. What other websites have is irrelevant. See how neither of them lists a source?