Daniel Nathan, professionally known as Frederic Dannay (October 20, 1905 – September 3, 1982), and Emanuel Benjamin Lepofsky, professionally known as Manfred Bennington Lee (January 11, 1905 – April 3, 1971), were American cousins from Brooklyn, New York who wrote, edited, and anthologized detective fiction under the pseudonym of Ellery Queen. The writers' main fictional character, whom they also named Ellery Queen, is a mystery writer and amateur detective who helps his father, Richard Queen, a New York City police inspector, solve baffling murders.