On the 49-03-27 program at about 8 minutes, Jack says, "you can say that again, Wonga" to Phil. I understand that part, but Phil replies "Well, how about it, Yankel?". Is that a Benny nickname? Apologies if this has been hashed over, but I didn't find it in a forum search.
Maybe the writers figured Wonga calling Jack "Benny" wouldn't work out so well.
Also, Googling reveals that Yankel is a common Yiddish nickname for "Jacob", so maybe someone actually called him that after he traded Benny for Jack.