Jean Stapleton was born Jeanne Murray in Manhattan, New York City, to Marie A. (Stapleton), an opera singer, and Joseph Edward Murray, a billboard advertising salesman. Her paternal grandparents were Irish. She was a cousin of actress Betty Jane Watson. Other relatives in show business were her uncle, Joseph E. Deming, a vaudevillian; and her brother Jack Stapleton, a stage actor. She graduated from Wadleigh High School, NYC, in 1939, and attended Hunter College. She worked as a secretary before becoming an actress. Stapleton made her stage debut at the Greenwood Playhouse, Peaks Island, Maine…