Re: 5x10 Vincent and the Doctor (Grading/Discussion) SPOILERS!!
QI, a british quiz show, helpfully did a small segment on the pronunciation of Van Gogh. Suffice to say no one in the episode said it correctly either:
"Does the cold of deep space make your nipples go pointy Bowie? Do you use your pointy nipples as telescopic antennae to transmit data back to Earth? I bet you do, you freaky old bastard you"