I actually have the entire collection of Empire Strikes Back cards from the 80s, but I shudder to think of the time it would take for me to locate them within the piles of my old junk. Perhaps I am wrong, but I sustinctly remember being somewhat confused by conflicting sources of his name and deciding on my own that obviously Zuckuss was the alien and 4LOM the droid. Had the figures been the only source of the names, I am sure my young self would have just went with the nonsensical 4LOM as the alien and Zuckuss as the droid. But I really have no way to confirm if the cards had their names without resolving myself to dedicate a few hour digging through boxes. I am surprised the internet doesn't have a more detailed story behind the bounty hunters identity confusion.

From what I read while trying to look into this, Kenner was in charge of naming many of the background characters that got figures, so if that is the case, and the names came from them and not anywhere else, then I concede that the original names they gave them were initially correct and the change may have been made retroactively.