| Birth Name: | Tertius Claude Losper |
| Birth Date: | 22 November 1985 |
| Birth Place: | Windhoek |
| Weight: | 188lbs |
| Ru Position: | Fullback, Fly-half |
| Repyears1: | 2007–11 |
| Repcaps1: | 10 |
| Reppoints1: | 24 |
Tertius Losper (born 22 November 1985 in Windhoek) is a Namibian rugby union fullback. He is a member of the Namibia national rugby union team and participated with the squad at the 2007 and 2011 Rugby World Cups.[1]