It is asked often was the surname for children that their parents were unknown. All over Spain they used the surname "Expósito" (Foundling), "Iglesias" (Churches) or "Iglesia" (Church).
In Galicia they used the surname “Deus” (God in Galician language) in the Province of A Coruña and in the south they used the same surname “Dios” but in Castilian language. On the contrary in Portugal they used the surname “Jesús”.
It was also common the use of the surname “Garcia” all over Spain and there is a quote that says “Garcia was the name for the ones that did not have one”, that rymes in Spanish (Quien nombre no tenia, García le ponían).