| Full name: | Nicolaas Hendrik Christiaan de Jong Theunissen |
| Born: | 4th May 1867, Colesburg, Cape Colony, South Africa |
| Died: | 9th November 1929, Willemsdal, Transvaal, South Africa |
| Batting: | Right-hand batsman |
| Bowling: | Right-arm fast |
| Teams: | South Africa (Test: 1888/89); Western Province (Main FC: 1889/90); All teams |
| Lists of matches and more detailed statistics | |
| Test Career Batting and Fielding (1888/89) | |||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | SRate | Ct | ||
| South Africa | 1 | 2 | 1 | 2 | 2* | 2.00 | 0 | 0 | 40.00 | 0 | |
| Test Career Bowling (1888/89) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| South Africa | 80 | 5 | 51 | 0 | 0-51 | 3.82 | ||||
| First-Class Career Batting and Fielding (1888/89-1889/90) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Overall | 3 | 6 | 3 | 66 | 49 | 22.00 | 0 | 0 | 1 | |
| First-Class Career Bowling (1888/89-1889/90) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| Overall | 579 | 39 | 247 | 20 | 7-41 | 12.35 | 3 | 1 | 28.95 | 2.55 |