Gustavus Adolphus De Russy (November 3, 1818 - May 29, 1891) was a US Army officer, who became a general during the American Civil War. De Russy was born in Brooklyn to French-American army officer René Edward De Russy and Helen Augusta Maxwell. He was also brother-in-law to Union general Henry Jackson Hunt. He entered West Point in 1835, but was forced to resign in 1838 for alcohol use. In 1847, he was commissioned a second lieutenant in the army and served in the Mexican-American War. By virtue of his service in the Mexican War he became a member of the Aztec Club of 1847 in 1881.