Forvo.com is a great website that features native speakers pronouncing words or names from all over the world. Apparently Vincent Van Gogh's name, which most of us lazy English speakers pronounce Van Go or Van Goff, is really pronounced closer to Van Hoch. You have to get really guttural with the GH.
Here's how it sounds. Make sure you hit the arrow with Juansi at the bottom of the page or else you'll get a German version.