| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Gerhard Oswald "Geert"•Lotsij | |
| Used name | Geert•Lotsij | |
| Born | 13 January 1878 in Dordrecht, Zuid-Holland |  NED |
| Died | 29 June 1959 (aged 81 years 5 months 16 days) in Hilversum, Noord-Holland | NED |
| Affiliations | Nereus — Amsterdam, Noord-Holland | NED |
| NOC | Netherlands | NED |
| Medals | OG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 0 |
| Total | 1 |
Lotsij competed in the Dutch coxed four together with his younger brother, Paul. In the controversial event, that eventually saw two separate finals, they finished second. He later became a doctor, and worked abroad.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1900 Summer Olympics | Rowing | NED |
Geert Lotsij | |||
| Coxed Fours, Men (Olympic) | Minerva Amsterdam | 2 | Silver |
