Guglielmo Massaia (9 June 1809 - 6 August 1889), born Lorenzo Massaia, was an Italian cardinal of the Roman Catholic Church who was also a missionary and Capuchin friar.
His baptismal name was Lorenzo; he took Guglielmo as religious name.
His cause of canonization has commenced the confirmation of his heroic virtue allowed for Pope Francis to name him as Venerable on 1 December 2016.