Annie Proulx is a writer hailing from Wyoming, and she's written some good stuff, including a book, The Shipping News, which was made into a pretty fine film (with some good Newfoundland music).
So, how should her name be pronounced? "LX" is an unusual consonent combination. I think it's pretty bad manners to pronounce names the wrong way, the wrong way being some way that is widely at odds with how the person themselves would be likely to pronounce it (or the natives of the locality in the case of a place name)- and I'd like to be able to refer to her in talk without being discourteous.