a minor Spanish dramatist of the school of Calderón, was the son of a Portuguese mother and a Sicilian merchant of Greek parentage who came to Madrid some time before 1631. He began writing for the stage in the early 1650s, gained favour at the courts of Philip IV and Charles II, and became a knight of St. John (of Malta) in 1660. It has been suggested that Juan Bautista may have been of Jewish stock, and that the Diamante family, including the playwright's half-brothers Pablo and Francisco Diamante who also achieved success in their different spheres, falsified public records of marriage, baptism, etc. in order to obscure their marrano origins.
