Isaac ben Shem Tov Cavallero (fl. 16th c.) was the author of Orden de Oraciones segundo el uso ebrèo en lengua ebraica y vulgar espanol (Venice 1552), the first siddur prepared for use by Sepharadim in Ladino throughout the Spanish-Portuguese diaspora. Members of the Cavallero family were active in Venice, Ferrara and Ancona mostly. Besides his work in publishing, Isaac Cavallero was a merchant with dealings in the Levant.