Well, tunes arent' my forte, but I've looked in Cass Meurig's "Alawon John Thomas: a fiddler's tune book from 18th C. Wales" and there's nothing close. I'm not keen on guesses, as they usually lead a person farther astray, but - what the hell - it's a grant Mudcat tradition and my guess would be, "Duwiol Mungo", lit. Godly Mungo.

Of course, if you really want to know, I suggest going to Cass Meurig's website and sending her a message. I suppose Bob Evans (Bragod) might, but I think Cass is originally from the North of England somewhere so ...

sian