Is anything more known of Isaac ben Shem Tov Caballero besides his having published "Orden de Oraciones segundo el uso ebrèo en lengua ebraica y vulgar español" (1552) the first siddur prepared for use by Sepharadim in Ladino translation throughout the Spanish-Portuguese diaspora (AFAIK)? I've been searching for more info and no such luck. There is an entry for him in the 1906 Jewish Encyclopedia but it's pretty minimal and even that seems a bit off in the dates it offers for him.https://archive.org/details/OrdenDeOracionesIsacHijoDeDonSemtobCavallero1552