Haha, my name is on the list! I have never heard of Quintana or Youngblood - I clearly don't mix in the right circles!
And
Tracy?! The most stereotypical non-posh name (along with
Sharon) of recent years? Hmm, I suppose before it became trendy it may have been used by the upper classes but I've never met any posh Tracies.
I'm not sure I agree about
Willa either, but that's another name I have only rarely come across. I'd say it's too unusual to be classified in any way. The rest though I could see moving in posh circles, some like
Harriet,
Imogen,
Rupert and
Sebastian more than some of the others.