- Christodoulou Nikos, Conductor
- Christofilaki Anastasia, GNO Chorus Member, Mezzo-Soprano
- Christopoulos Yannis, Soloist, Tenor
- Christoulas Georgios, Soloist, Tenor
- Chrysochoou A., GNO Chorus Member, Soprano
- Chryssicos Markellos, Conductor
- Chung Ho-Yoon, Soloist, Tenor
- Ciannella Giuliano, Soloist, Tenor
- Ciconia A., Soloist, Soprano
- Cifrone Antonia, Soloist, Soprano
- Cilea Francesco, Composer
- Cimarosa Domenico, Composer
- Cioni-Leoni Maria-Luisa, Soloist, Soprano
- Civinini Guelfo, Librettist
- Clark Jon, Lighting designer
- Clément Mariame, Director
- Cleva Fausto, Conductor
- Cognet André, Soloist, Baritone
- Colautti Arturo, Librettist
- Collado José María Cervera, Conductor
- Collectif (LA)HORDE, Movement director
- Collier Marie, Soloist, Soprano
- Collins Aletta, Choreographer
- Colombara Carlo, Soloist, Bass
- Condondina Alice, Dancer, Choreographer, Director
- Conrad Andreas, Soloist, Tenor
- Constable Paule, Lighting Designer
- Constantini Sergio, Soloist, Tenor
- Constantini, Sergio, Soloist, Tenor
- Copley John, Director
- Corday Ken, Soloist, Tenor
- Corder Simon, Light designer
- Cordone Mario, Conductor
- Corena Fernando, Soloist, Baritone
- Cormon Eugène, Librettist
- Cornetti Marianne, Soloist, Mezzo-Soprano
- Corradi Mario, Director
- Corsi Massimo, Lighting designer
- Costanzo Giuseppe, Soloist, Tenor
- Costea Cellia, Soloist, Soprano
- Costoglou Margarita, Dancer
- Cotti Carlo, Director
- Couderc Simone, Soloist, Mezzo-Soprano
- Crawley Richard, Soloist, Tenor
- Crowley Bob, Set and Costume Designer
- Crozier Eric, Librettist
- Cupido Alberto, Soloist, Mezzo-Soprano
- Cutler Eric, Soloist, Tenor
- Eugene D' Albert, Composer
- Ponte Lorenzo Da, Librettist
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