J.L. Leonhardt
| full name | J.L. Leonhardt | |
| nationality | Germany (GER) | |
| born | unknown | in unknown |
Championships - Medal table and top 10 positions
| kampioenschap | gold | silver | bronze | 4th-6th | 7th-10th | starts |
 ECh Allround | 0 | 0 | 0 | 0 | 0 | 1 |
Championships - Results
| year | position | championship | place | |
| 1891 | NC7 | ECh Allround | Hamburg | GER |
