O'Brien (1878–1962), auxiliary bishop of Chicago, Illinois, USA William J. O'Brien (Medal of Honor) (1899–1944), United States Army officer during World War II William J. O'Brien, inventor of the Decca Navigator System William S. O'Brien (1825–1878), American businessman Bill O'Brien (actor), Director of Theatre and Musical Theatre for the National Endowment for the Arts; actor Tim O'Brien (author) (William Timothy O'Brien, born 1946), American author Billy Porter (criminal) (William O'Brien, 1850–?), American burglar and underworld figure in New York City William O'Brien (archaeologist), Irish professor of archaeology in University College Cork. Things SS William O'Brien, steam cargo ship built in 1914–1915 by New York Shipbuilding Company of Camden, foundered in April 1920 See also Will O'Brien, a character in the TV series Mile High William O'Bryan (1778-1868), English preacher