John Pershing Byrnes Place Category: Business Lawyer ProfileReviewsJohn Pershing Byrnes completed law school at University of South Carolina and has been practicing law since 11/13/1989. John Pershing Byrnes is located in Saint Simons Island, GA Leave a Review Cancel reply Your email address will not be published.Review text Select a rating Overall Select a rating Rating Name Email Website Save my name, email, and website in this browser for the next time I comment. * Previous Next