This is the 6516th most frequent Swedish word.
martínez
"Martínez" is not a Swedish word; it is a Spanish surname.
In this sentence, 'Martínez' is used as a proper noun to refer to a surname.
Martínez är en vanlig efternamn i Spanien.
Martínez is a common last name in Spain.
Here, 'Martínez' identifies a specific surname of a referenced individual.
Jag träffade en vän vars efternamn var Martínez.
I met a friend whose last name was Martínez.
In this sentence, 'Martínez' names a particular individual, employed as a proper noun to specify a colleague.