Angelo was born in Naples to Benvolio and Maria Entori in 1632 during the third-to-last year of his grandfather's reign. He was the first member of the Entori family born in the city of Naples and not Caligari Sicily. His younger sister Joan was born two years after him, and they are the only two surviving children of Benvolio II. Angelo married Luigia Arbora in 1555, and currently has one son who has lived past infancy named Carlo.