Complex sentence: The original name of the club had been "Πανιώνιος Γυμναστικός Σύλλογος Σμύρνης (Panionios Gymnastikos Syllogos Smyrnhs, PGSS)", i.e. Pan-Ionian Gymnastic Association of Smyrna, which is currently the name of the amateur sports club from which Panionios NFC developed.
Split into simpler sentences: The original name of the club had been "Πανιώνιος Γυμναστικός Σύλλογος Σμύρνης (Panionios Gymnastikos Syllogos Smyrnhs, PGSS)", which translates to the Pan-Ionian Gymnastic Association of Smyrna. This is currently the name of the amateur sports club from which Panionios NFC developed.