what is a coppersmith? in the bible

Well, in 2 Timothy 4:14 (King James Version), it’s written that “Alexander the coppersmith did me much evil: the Lord reward him according to his works…” I think that’s probably using the standard definition of “coppersmith”, unless Alexander really was a brightly colored bird of southeast Asia. But why a coppersmith is in the Bible, I don’t know. I’m no Biblical scholar (as this paper makes abundantly clear), and I believe — although I don’t know and should probably ask my father or grandfather — that our last name was Americanized from the German somewhere along the way. I don’t think our ancestors were ever actually coppersmiths — although, like I said, I don’t know that for sure.