I'm Vietnamese. My name's fairly simple. It's Minh. I've heard it every single way. Often I hear “Ming”, and I ask myself where in Minh they would hear a G. I've kind of just developed a little bit of a shell on that.
My last name, Doan, is Vietnamese. Because of the French influence, we pronounce it “Do-ahn”, but I'm used to being called Doan as well, similar to a hockey player, I believe. I don't watch hockey, but I believe there's a famous hockey player with the last name Doan.
I prefer “Do-ahn”, but I totally accept Doan as well.