- Piacentini Bruno, Soloist, 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
- Pirozzi Anna, Soloist, Soprano
- 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
- Pountney David, Director, Librettist
- Praga Marco
- Pragkasti Harris, GNO Chorus Member, Soprano
- Prasinou Dora, Dancer
- Preis Alexander, Librettist
- Preisinger Barunka, GNO Chorus Member, Mezzo-Soprano
- Prevedi Bruno
- Přibyl Vilém, Soloist, Tenor
- Priftis Panagiotis, GNO Chorus Member, Tenor
- Pritsa Tota, Set and Costume Designer
- Proietti Federica, Soloist, Soprano
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