Evelyn Schaefer Niedenzu, 92, died Sunday, Feb. 16, 2020, in her sleep. She was born July 3, 1927, in Fritzlar, Germany. Following World War II, she immigrated in 1950 to New York City. She married Dr. Kurt Niedenzu, also of Fritzlar, Germany, in Brooklyn, N.Y., in May 1958. She and …