From Longman Dictionary of Contemporary Englishproconsulpro‧con‧sul /prəʊˈkɒnsəl $ proʊˈkɑːn-/ noun [countable] PGOsomeone who governed a part of the ancient Roman Empire
Examples from the Corpus
proconsul• Paskevich soon moved from the Caucasus to Warsaw, but other proconsuls continued his work.• This monster used to come up literally out of the sea, with the arrival of the Roman proconsul at Ephesus.Origin proconsul (1300-1400) Latin pro consule “for a consul” 