I think they do say the name on the TV commercial, but I haven't seen it so I can't say how it's pronounced there. When I hear it in my head, it usually has the accent on the second syllable, with a faint "ah" at the end, the way final "e's are pronounced in German. So, it would be something like "Mor-GAN-thuh." But I'm not sure...and it seems no one else is, either, since no one has come forward with a good answer to your question! :-)
I always thought it was more-GHEN-thee or more-GHAN-thay, but I don't know if that's right....
Sophia AshHeart Level 51 Balance
P.S. I almost never play with sound, just in case that helps.
Morganthe is pronouced MORE-GANTH. But I don't really care if I pronounce words the way I say it because it's just how I am. So it doesn't really matter.