Carl Ferdinand Pfeifer (December 18, 1915 – May 12, 2001) was an officer in the United States Navy and naval aide to Presidents Harry S. Truman and Dwight D. Eisenhower.A native of Springfield, Ohio, he would marry twice. His first marriage, to Dorothy Dowling, ended in divorce. He was married to Mary Louis Whitmore for the rest of his life. He is buried at Arlington National Cemetery.