Context_1 : Typhoon Cobra, also known as the Typhoon of 1944 or Halsey's Typhoon (named after Admiral William 'Bull' Halsey), was the United States Navy designation for a tropical cyclone that struck the United States Pacific Fleet in December 1944 during World War II. Context_2 : Admiral (abbreviated as ADM) is a four-star commissioned naval flag officer rank in the United States Navy, the United States Coast Guard, and the United States Public Health Service Commissioned Corps, with the pay grade of O-10. Admiral ranks above vice admiral and below fleet admiral in the Navy; the Coast Guard and the Public Health Service do not have an established grade above admiral. Admiral is equivalent to the rank of general in the other uniformed services. The National Oceanic and Atmospheric Administration Commissioned Officer Corps has never had an officer hold the grade of admiral. However,  /201 § 201  of the U.S. Code established the grade for the NOAA Corps, in case a position is created that merits the four-star grade. Context_3 : Fleet admiral (abbreviated FADM), officially known as "Fleet Admiral of the United States Navy", is a five-star flag officer rank in the United States Navy. Fleet admiral ranks immediately above admiral and is equivalent to General of the Army and General of the Air Force. Although it is a current and authorized rank, no U.S. Navy officer presently holds it, with the last living U.S. Navy fleet admiral being Chester W. Nimitz, who died in 1966. Context_4 : Marshal-admiral (元帥海軍大将 , gensui-kaigun-taishō ) was the highest rank in the prewar Imperial Japanese Navy. The term "gensui" was used for both the navy and the Imperial Japanese Army, and was a largely honorific title awarded for extremely meritorious service to the Emperor. In the Meiji period, the title was awarded to five generals and three admirals. In the Taishō period it was awarded to six generals and six admirals, and in the Shōwa period it was awarded to six generals and four admirals. Equivalent to a five-star rank (OF-10), it is similar to Admiral of the Fleet in the UK Royal Navy and fleet admiral in the United States Navy. Context_5 : The "Nimitz"-class supercarriers are a class of ten nuclear-powered aircraft carriers in service with the United States Navy. The lead ship of the class is named after World War II United States Pacific Fleet commander Fleet Admiral Chester W. Nimitz, the U.S. Navy's last fleet admiral. With an overall length of 1092 ft and full-load displacement of over 100,000 long tons, they have been the largest warships built and in service. Context_6 : This is a complete list of four-star admirals in the United States Navy. The rank of admiral (or "full admiral", or "four-star admiral") is the highest rank normally achievable in the U.S. Navy. It ranks above vice admiral ("three-star admiral") and below fleet admiral ("five-star admiral"). Context_7 : William Frederick Halsey Jr., GBE (October 30, 1882August 16, 1959), known as Bill Halsey or "Bull" Halsey, was an American admiral in the United States Navy during World War II. He is one of the four individuals to have attained the rank of Fleet Admiral of the United States Navy. Context_8 : Cape Leahy ( ) is an ice-covered cape which marks the northern extremity of Duncan Peninsula, Carney Island, along the coast of Marie Byrd Land, Antarctica. It was discovered and photographed from the air on January 24, 1947, by United States Navy Operation Highjump, 1946–1947, and named by Rear admiral Richard E. Byrd for Fleet Admiral William D. Leahy, U.S. Navy, who, as naval advisor to President Harry S. Truman at the time of Operation Highjump, assisted materially at the high-level planning and authorization stages. Context_9 : Two ships of the United States Navy have been named USS "Halsey" in honor of Fleet Admiral William F. "Bull" Halsey (1882–1959), who served in the United States Navy during the First and Second World Wars. Both ships used guided missiles as their primary armament Context_10 : The United States Fleet was an organization in the United States Navy from 1922 until after World War II. The acronym CINCUS, pronounced "sink us", was used for Commander in Chief, United States Fleet. This was replaced by COMINCH in December 1941, under , when it was redefined and given operational command over the Atlantic, Pacific, and Asiatic Fleets, as well as all naval coastal forces. authorized the offices of the CNO and COMINCH to be held by a single officer; Admiral Ernest J. King was first to do so, and 1944 was promoted to the five-star rank of fleet admiral. fact_1 : Typhoon Cobra, also known as the Typhoon of 1944 or Halsey's Typhoon (named after Admiral William 'Bull' Halsey), was the United States Navy designation for a tropical cyclone that struck the United States Pacific Fleet in December 1944 during World War II. fact_2 : William Frederick Halsey Jr., GBE (October 30, 1882August 16, 1959), known as Bill Halsey or "Bull" Halsey, was an American admiral in the United States Navy during World War II. fact_3 :  He is one of the four individuals to have attained the rank of Fleet Admiral of the United States Navy. Question: Who was the Fleet Admiral of the Unites States Navy that Typhoon of 1944 was named after?
Output: William Frederick Halsey Jr.