| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | János•Dzvonyár | |
| Used name | János•Dzvonyár | |
| Born | 28 March 1961 in Debrecen, Hajdú-Bihar |  HUN |
| Measurements | 181 cm / 69 kg | |
| Affiliations | Budapesti Spartacus SC — Budapest, Budapest | HUN |
| NOC | Hungary | HUN |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1980 Summer Olympics | Swimming (Aquatics) | HUN |
János Dzvonyár | |||
| 100 metres Breaststroke, Men (Olympic) | 5 | |||||
| 200 metres Breaststroke, Men (Olympic) | 10 | |||||
| 4 × 100 metres Medley Relay, Men (Olympic) | Hungary | 6 |
