I know this is an old thread and all, but I found it being pronounced on Merriam Webster. And they actually say it for you. I can just that I didn't know how to say it either after only reading the name and never hearing anyone say it. But you can hear it pronounced here, a la Merriam Webster: http://www.merriam-webster.com/cgi-bin/audio-medlineplus.pl?wyando01.wav=wyandotte
eta: I used to pronounce it why-an-dote, as in "doting father"