Full name: Joachim Joseph Gruppelaar
Gender: Male
Born: October 24, 1911 in Amersfoort, Utrecht, Netherlands
Died: July 12, 1971 in Renkum, Gelderland, Netherlands
Country:
Netherlands
Sport: Equestrianism
| Games | Age | City | Sport | Event | Team | NOC | Rank | Medal | |
|---|---|---|---|---|---|---|---|---|---|
| 1948 Summer | 36 | London | Equestrianism | Men's Jumping, Individual | Netherlands | NED | 20 | ||
| 1948 Summer | 36 | London | Equestrianism | Men's Jumping, Team | Netherlands | NED | AC | DNF |
| Games | Age | City | Sport | Country | Horse | Phase | Unit | Rank | F | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1948 Summer | 36 | London | Equestrianism | Netherlands | Random Harvest | Final Standings | 20 | 36.00 |
| Games | Age | City | Sport | Team | NOC | Horse | Phase | Unit | Rank | F | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1948 Summer | 36 | London | Equestrianism | Netherlands | NED | Random Harvest | Final Standings | AC | DNF | 36.00 |