What is "crescentinus"

Saint Crescentinus (died June 1, 303) is the patron saint of Urbino whose feast day is celebrated on June 1. Venerated as a warrior saint, he is sometimes depicted on horseback, killing a dragon, in the same manner as Saint George. However, as Martin Davies writes, "S. Crescentino’s story, so far as I am aware, excludes a Princess or other female victim."

The coin known as the armellino (and popularly as the volpetta) issued by the duke of Urbino, Francesco Maria I della Rovere, featured Saint Crescentinus on horseback.