This is the 3780th most frequent French word.
stefano
"Stefano" is not a French word; it is an Italian given name equivalent to "Stephen" in English.
In this sentence, 'Stefano' is used as a proper noun referring to an individual's name.
Stefano est un étudiant brillant en musique.
Stefano is a brilliant student in music.
Here, 'Stefano' again functions as a proper noun, mentioned inquiring about his availability.
Savez-vous si Stefano est disponible pour le concert ce soir ?
Do you know if Stefano is available for the concert this evening?
In this instance, 'Stefano' is used as a possessive, denoting ownership of the compositions.