So, how in the hell do you pronounce the name of the German philosopher, Friedrich Nietzsche? I have long pronounced it as Nai-chay, but then that's how I also pronounce the Apache comrade of Geronimo: Naiche. Turns out, just like with van Gogh, there are various pronunciations, most of them wrong.
Okay, here are a couple online answers:
Because American English has a lot of silent “e”s, some people don't pronounce the schwa, in much the same way they mispronounce the automobile “Porsche”. This is pronounced as in Shakespeare, “Portia.” The first syllable of Nietzsche “neet” is ever so slightly longer than the second, but not much.
On a similar note, here is a particularly succinct take on the various pronunciations of van Gogh: