Nacho is the common short form of the Spanish name Ignacio. The feminine form is Nacha, for the given name Ignacia.
Although there is no official record for it, it seems to be connected with the visit of Ignacio de Loyola to Rome in 1538 to get the Pope's approval for his foundation of the Company of Jesus. During his stay in Italy, the Italian pronunciation of his Spanish name, Ignacio, led to the form Nacho and remained as a familiar way to address people named Ignacio. [1] Since then, Jesuits are commonly called "nachos". [2]