what was the name prior to this name

That restaurant is called casa de Pico

Casa Guadalajara has been in its present location for many years. People often confuse it with another restuarant that used to be in the old town square and is now located in Grossmont Center. The restuarant took its name from its location, in the square that was once the home of the last Mexican Governor of Alta, California, Pio Pico Casa de Pico