 Younger brother Wilder Dwight was born April 23, 1833, became lieutenant colonel the 2nd Regiment Massachusetts Volunteer Infantry, and died September 19, 1862 from wounds at the Battle of Antietam.Younger brother Howard Dwight was born October 29, 1837, became captain, and died May 4, 1863 during the Battle of Port Hudson.Another younger brother Charles Dwight was born May 5, 1842 attended Harvard University but left to join the army.