It's probably best if you read the article before asking a question that's answered within it.
From the referenced page: It's pronounced "Icks-auth"
Luckily, you can name it anything you want in your address book.
"Watson, please order me the usual from Grub Hub"
The name comes from a monster in Nethack, for the curious: http://nethack.wikia.com/wiki/Ixoth