| Ochmann, Moritz [1] |
| Offner, Thomas [1] |
| Ohlweiler Rozenblit, Fernando [1] |
| Okom, Camille Inès Alexandra [1] |
| Olendrowitz, Christian [1] |
| Oliveira, Bárbara [1] |
| Olsthoorn, Helena Maria [1] |
| Opazo Dávila, Luis Felipe [1] |
| Opitz, Alexander [1] |
| Orfaniotou, Foteini [1] |
| Oshima-Takago, Tomoko [1] |
| Osman, Sara [1] |
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| Ouazan-Reboul, Vincent [1] |
| Ovezmyradov, Guvanchmyrat [1] |
| Owald, David [1] |
| Öz, Pýnar [1] |
| Özçete, Özge Demet [1] |
| Pachoud, Mathieu [1] |