Hubert Tamblyn Spiva, Jr., known as Tam Spiva (June 18, 1932 – April 30, 2017), was an American television screenwriter from Pacific Palisades, California, who was best known for his work on ABC's The Brady Bunch situation comedy (1969–1974), starring Florence Henderson and Robert Reed, and CBS's family drama Gentle Ben (1967–1969) starring Dennis Weaver and Clint Howard.