Les B, I have heard some Hank Williams as Luke the Drifter, and Sheb Wooley used another name for novelty songs. Paul Weston and Jo Stafford recorded as Darlene & Jonathan Edwards (or some such). But these were instances of using a different (usually comic) persona, as it were. But thanks for the response.
I have also had the misfortune to buy duplicate records put out on different labels, with different art work etc., but the exact song program on the discs...Mary McCaslin, Dave Van Ronk and Travis Edmunson duplicates come immediately to mind.