House of Sforza
A member of the House of Sforza, Alessandro Sforza was born in Rome in 1534, the son of Bosio II Sforza, count of Santa Fiora e Cotignola, and his wife Costanza Farnese, who was the natural and legitimized daughter of Pope Paul III. His brother Guido Ascanio Sforza di Santa Fiora also became a cardinal. He was the uncle of Cardinal Francesco Sforza.