Ms Lepak,
I'm interested in your theory that Lord Lovel is a 'remake' of Lord Levett. Personally I see Lord Lovel as a burlesque of some earlier lost ballad, like a few other Child Ballads. Perhaps you would be kind enough to post the text of Lord Lovett or perhaps Jim could do this for us so we can draw our own conclusions.

As most of the English language ballads that use this motif can't be pushed back any further than the 18th century I think it more likely the ballads picked up this motif from continental translations than directly from T&I.