This is the 637th most frequent Spanish word.
fernández
"Fernández" is a Spanish surname meaning "son of Fernando."
The word 'Fernández' is used here as a surname, indicating the specific identity of the neighbor.
El señor Fernández es mi vecino.
Mr. Fernández is my neighbor.
Here, 'Fernández' represents a category or type of surname, used as an example to describe its prevalence.
El apellido Fernández es muy común en España.
The surname Fernández is very common in Spain.
In this context, 'Fernández' refers to an individual identified by this surname, emphasizing their role or action.