Isaac Chayyim Cantarini, also known as Isaacus Viva, (2 February 1644 – 8 June 1723) was an Italian poet, writer, physician, rabbi and preacher. He studied Hebrew and the Talmud with Solomon Marini, author of the Tiqqun 'Olam, and with the poet Moses Catalano. His instructor in secular subjects was Bernardo de Laurentius. He was the nephew of Judah ben Samuel ha-Kohen Cantarini, also a physician and rabbi of Padua.