That's great. What's also amusing is how you felt it necessary to provide the diacritical pronunciation guide for "Vaughan"... because I think to most native English speakers we can't imagine any other pronunciation!
Loughborough, which has it both ways. (Apocryphally pronounced by Australians as "Loogahbaroogah".)
How about Sequim, WA. Guess how to pronounciate that.
My years of french class steered me wrong there.
Maybe there's also an interesting thread to pull on in that the pattern may be more pronounced for names (e.g. Hughes). Just ruminating here though, I don't have a source for any of this.