| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Jean•Dacian-Costiesco | |
| Used name | Jean•Dacian-Costiesco | |
| Affiliations | ? — Bruxelles (Brussels), Région de Bruxelles-Capitale |  BEL |
| NOC | Romania |  ROU |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1900 Summer Olympics | Fencing | ROU |
Jean Dacian-Costiesco | |||
| Épée, Individual, Men (Olympic) | AC p12 r1/4 |
