The treble clef located on the second line of the staff is called the second treble clef or simply the treble clef. In the baroque period it was known as the "Italian key". Currently in English and German it is called respectively "treble clef" ("treble clef") and Violinschlüssel ("violin clef").
The treble clef is also called the “G clef” because the symbol at the beginning of the staff (a stylized letter “G”) encircles the second line of the staff, indicating that line to be G4 (or G above middle C).
