Patricio means Patriot, or also a member of the elite noble ruling class.
It comes from the noble, ruling, roman class known as the Patricians.
From this, gave rise to other words relating to home-country and love of country:
Patria (Home Country), Paisano (Fellow Countryman), Compatriota (again, fellow countryman), Patriot (he whom loves and is willing to sacrifice himself on behalf of his country), Patrick (Patricio in English) Patricia (Feminine version of Patrick).
Patricio is a popular name among Catholics, as Saint Patrick was a Saint who lived in Ireland was an instrument of God in this great country.
Yet the name is also popular in other countries and other languages, with the common uniting force being the Holy Christian Catholic Religion.