ר"ן

Nissim ben Reuven of Girona, Catalonia was an influential talmudist and authority on Jewish law. He was one of the last of the great Spanish medieval Talmudic scholars. He is also known by his Hebrew acronym, the RaN, or else with the definite article HaRaN, as well as by the name RaNbaR, the Hebrew acronym of his full name, including his father's name, Reuven, and also by Nissim Gerondi.