Did you know that Spanish surnames ending in “-ez” or “-es” come from a latin suffix meaning “son of”? One of my surnames is “Ibáñez”, then it will mean “son of Ivan” 
. Interesting, isn’t it?
Can you think of any other surnames and guess what are their “parents”?
Soy Esteban Estevez, encantado… 
My second surname is González… so I guess it would be “son of Gonzalo”.
How would it be with names like Pérez or López?
@Michi interesting!
I guess Pérez would be “son of Pedro” but I find López more difficult: would it be “son of Lope”?
Probably yes… it is a very old name, that if not very used (if it is) at this time and age. For example: https://en.wikipedia.org/wiki/Lope_de_Vega
My second surname is Sánchez… so… daughter of Sancho… Panza? 