Don Pepin pronounced Pep-EEN.
Still not 100% sure about Davidoff. I now know the a is not long like in "day", is instead Dah-vidoff, but I'm unsure of the "i" and if it should be "Dah-veed-off".?
I have heard Esteli pronounced a couple different ways with the emphasis on different syllables. I have heard the most common Americanized stressor on the middle syllable, but I believe this to be incorrect. The Drew Estate rep, Wild Bill, pronounced it with the stress on the last syllable (este-LEE). This is the one I've heard other Spanish pronunciations of. I have also seen a few were the first syllable was stressed.