- Sidhom Peter, Soloist, Baritone
- Sidonie-Gabrielle Colette, Αuthor, Librettist
- Sieden Cyndia, Soloist, Soprano
- Siegel Gerhard, Soloist, Tenor
- Sigalos Dimitris, Soloist, Tenor
- Silverman Adam, Lighting designer
- Silvester Attila-Akyla, Dancer, Choreographer
- Silvestr M., Soloist, Soprano
- Silvestrelli Andrea, Soloist, Bass
- Simiriotis C., Soloist
- Simon André, Choreograher
- Simonetti Maria, Choreographer
- Simoni Renato, Librettist
- Simou Kalliopi, Actress
- Sinanos Andreas, Lighting Designer
- Siotas Fotis, Musician
- Siousti Alice, Musician
- Siouta Anastasia, Dancer
- Sipri Ilir, Dancer
- Sir Nicholas Hytner, Director
- Siri Maria José, Soloist, Soprano
- Sirlantzis Timos, Solist, Bass-Baritone
- Sisilianos(Sicilianos) Giorgos(Yorgos), Composer
- Sisillo Aldo, Conductor
- Sismani-Athanasopoulou Iro, Dancer, Choreographer
- Siwek Rafał, Soloist, Bass
- Skafidas Panagiotis (Takis), Soloist, Tenor
- Skalkotas Nikos, Composer
- Skandali Efrosyni, GNO Chorus Member, Mezzo-soprano
- Skaramagka-Bourdara Fotini, Soloist, Soprano
- Skarlatou Maria, Soloist, Soprano
- Skarlatou-Paraskevopoulou Despoina, Soloist, Soprano
- Skellas A ., Soloist
- Skendros Petros, Soloist, Tenor
- Sklavos Georgios, Composer, Music Critic
- Skordouli-Kassi Lela, Soloist, Soprano, Actress
- Skouloudis Manolis, Composer, Screenwriter, Translator
- Skourletis Konstantinos, Set and Costume Designer
- Skourletis Yannis, Director
- Slater Montagu, Poet, Novelist, Librettist
- Slavkova Maria, Soloist, Soprano
- Smith Adam, Soloist, Tenor
- Smith Charles Cusick, Set and costume designer
- Smith Daniel, Soloist, Bass
- Smith Daniel, Conductor
- Smith Jane-Lawrence, Actress, Soloist, Soprano
- Smyrneos(Smirneo) Panagiotis (Pan), Soloist, Tenor
- Snell Martin, Soloist, Bass
- Sohn Anna, Soloist, Soprano
- Sohos Onoufrios, Soloist, Bass, Chorus Master
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