Elizabeth Haas and William Cavanaugh III were married Nov. 7 at St. Agnes Cathedral in Rockville Centre. The reception was at the Rockville Links Country Club. She is an English teacher and is the daughter of Ruth and Walter Haas of Lynbrook. The bridegroom is a trader for Cantor Fitzgerald in Manhattan and is the son of Mary Ellen and William Cavanaugh Jr. of Ridgefield, Conn. The bride earned a master of science degree in education from Hofstra University. The groom earned a bachelor of arts in marketing from Iona College. They live in Rockville Centre.