The Diamante citron (Citrus medica var. vulgaris or cv. diamante − Italian: cedro di diamante, Hebrew: אתרוג קלבריה or גינובה) is a variety of citron named after the town of Diamante, located in the province of Cosenza, Calabria, on the south-western coast of Italy, which is its most known cultivation point. This is why this variety is sometimes called the "Calabria Esrog". "Esrog" is the Ashkenazi Hebrew name for citron. The Purdue University website