I can find no reference to any saint named Vaughn.
Vaughn Booker's birth name is Vaughn Jamel Booker.
Juan Vaughn goes by Kanyama Vaughn.
Vaughn Juares goes by Vaughn Juares.
Harry Vaughn III goes by Jeff Vaughn.
Alberta Vaughn's birth name is Alberta F. Vaughn.
Countess Vaughn's birth name is Countess Danielle Vaughn.
Ivana Vaughn's birth name is Ivana Amaris Vaughn.
Mo Vaughn's birth name is Maurice Samuel Vaughn.
Rees Vaughn's birth name is Charles Rees Vaughn.
Vince Vaughn's birth name is Vincent Anthony Vaughn.
Walter Vaughn's birth name is Gerald Oliver Vaughn.
Bailey Vaughn McAndrew goes by Bailey Vaughn.