1915 – 1922; O’Brien (DD-415) , 1940 - torpedoed in 1942; O’Brien (DD-725) , 1944 – 1972; O’Brien (DD-975) , 1976 - 2004.   A privateer , Jeremiah O'Brien continued under a Letter of Marque from Congress as the captain of UNITY, renamed MACHIAS LIBERTY, for two years.  His brother John