Royal Eason Ingersoll (20 June 1883 – 20 May 1976) was a United States Navy four-star admiral who served as Commander in Chief, U.S.
Atlantic Fleet (CINCLANT) from January 1, 1942 to late 1944; Commander, Western Sea Frontier from late 1944 to 1946; and Deputy Commander in Chief, U.S.
Fleet/Deputy Chief of Naval Operations (DCOMINCH/DCNO) from late 1944 to late 1945.
Ingersoll was born in Washington, D.C., on 20 June 1883.
He was second in a succession of three generations of U.S.
Naval officers: his father, Rear Admiral Royal R.
Ingersoll - United States Naval Academy class of 1868, and his son, Lieutenant Royal Rodney Ingersoll II - USNA class of 1934, was killed in a "friendly fire" accident on board the aircraft carrier Hornet (CV-8) on 4 June 1942, during the naval Battle of Midway.