Rassie is of South African origin, derived from the Afrikaans name Ras, which means 'race'. It gained prominence during the apartheid era and has since been associated with South African rugby due to Rassie Erasmus, a former Springboks coach and player.
The name Rassie appears to have been popular among parents over several decades, with five babies given this name annually between 1913 and 1942, resulting in a total of twenty births during that period.