Gert Coetzer (c. 1938–39 – 10 November 2018), also known by the nickname of "Oupa" (meaning "Old Man" in Afrikaans), was a South African rugby union and professional rugby league footballer who played in the 1950s and 1960s. He played representative level rugby union (RU) for Orange Free State (now represented by the Free State Cheetahs), and at club level for (in Bloemfontein, South Africa), as a wing, and representative level rugby league (RL) for South Africa (non-Test matches), Other Nationalities and , and at club level for (in Johannesburg, South Africa), (in Bloemfontein, South Africa), and Wakefield Trinity (Heritage № 682), as a wing, or centre, i.e. number 2 or 5, or 3 or 4.