I am guessing it is named like all other Chinese American dishes - meaning the name of a province tagged with a food. Examples are... Hunan Sauce, Szechuan Beef, Mongolian Beef, etc. I laugh everytime I see that on menus. It's like saying Iowa Sauce. But then again, I remember in diner menus in NYC, there were plenty of California xxxxx which usually meant the dish had avocados.