- Petridis Petros (Ioannis), Composer, Conductor
- Petrogianni Vassiliki, GNO Chorus member, Mezzo-soprano
- Petropoulos Nikos, Director, Set Designer, Costume Designer
- Petrou George, Conductor
- Petrova Anna, Dancer, Choreographer, Dance Instructor
- Petrova Olesya, Soloist, Mezzo-Soprano
- Petsatodi Katerina, Director
- Petzold Guido
- Pevzner Julia, Director
- Pezanou Lili, Set Designer
- Pezopoulou Veta, Libretto translation in Greek
- Pfeffer Walter, Conductor
- Phoenix Manuel, Chorus Member, Tenor
- Piave Francesco-Maria, Librettist
- Piavko Vladislav, Soloist, Tenor
- Picchi Mirto, Soloist, Tenor
- Piccioli Fabiana, Lighting Designer
- Pikias Manolis
- Pilou Jeannette (Ioanna), Soloist, Soprano
- Pimlott Steven, Director
- Platanias Dimitri, Soloist, Baritone
- Plataniotis Michalis, Soloist, Baritone
- Plati L., Soloist, Soprano
- Pobbe Marcella, Soloist, Soprano
- Poet Bruno, Light Designer
- Poettgen Ernst, Director, Publisher, Translator
- Polatov(Apostolatos) Michalis, Fashion Designer, Set Designer, Costume Designer
- Polemis Ioannis
- Poli Pier Francesco
- Polychronou Mina, Soloist, Soprano
- Politi Vasso, Dancer
- Politis Odysseas, Member of GNO Children's Chorus
- Polychronou Evangelia
- Pomoni N.
- Pomonis K., Soloist, Tenor
- Pomponi Franco, Soloist, Baritone
- Ponchielli Amilcare, Composer
- Poniridis Giorgos, Composer
- Pop Stefan, Soloist, Tenor
- Popović Dušan, Soloist, Baritone
- Poriotis Nikos, Libretto translation in Greek
- Porta Gustavo, Soloist, Tenor
- Portika Anna
- Potamianos Spyros, Librettist
- Poulakou N.
- Poulenc Francis, Composer
- Poulimenou-Cappon Rosa, Soloist, Soprano
- Poulisi , Soloist, Soprano
- Poulitsi Christina, Soloist, Soprano
- Poulou Gina, Soprano
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