The two most controversial pronounciations here are Proenza Schouler and Ghesquiere, right? I am almost positive that Tim Blanks (host of Fashion File, a Canadian fashion show) when interviewing these people pronounces:
GHESQUIERE: hess-key-eh
PROENZA SCHOULER: proenza shoe-ler
GHESQUIERE: hess-key-eh
PROENZA SCHOULER: proenza shoe-ler