William H. O'Brien [Edit] By Sticky Facts Editorial StaffWilliam H. O'Brien biography, ethnicity, religion, interesting facts, favorites, family, updates, childhood facts, information and more:William H. O'Brien date of birth:July 19, 1891How old was William H. O'Brien when died?89When did William H. O'Brien die?April 18, 1981 Tags: birth day 19birth month julybirth year 1891death day 18death month aprildeath year 1981 Suggested Posts Mila Kunis Facts Taylor Swift Facts David Beckham Facts Mark Wahlberg Facts George Harrison Facts Adele Facts Lady Gaga Facts Robert Downey Jr. Facts