Late 14c., "governor or armed service commander of an historic Roman province," acquiring there many of the duties and authorities of the consul in Rome, from Latin proconsul "governor of a province; military services commander," from phrase Professional consule "(acting) rather than a consul," from pro "in In March 2005, https://napoleonm307yel1.dailyhitblog.com/31963703/the-smart-trick-of-pro-that-nobody-is-discussing