Thanks, Erin, for refreshing this fun thread. I doubt it was from the Duna. I'd still stand by my original position (in my original position? on my original position?), namely, that it's simply a nonsense word. I will maintain that until I'm proven wrong by a knowledgeable person...or until I change my mind!

Aloha,
Mark

PS: Gordon Bok had a song called Duna on his very first album. I think he wrote it, though I'm not sure. It has nothing whatever to do with "Dona, Dona," but I mentioned it because I like the song and because I'm going to be seeing him in concert in Massachusetts next month!