One baby girl was named 'FIFA' (all in capitals) after the sport's governing body, while another was called 'Ke Nako', a World Cup slogan that means 'it is time'.
FIFA Ntshinga was born at Rahima Moosa Hospital in Johannesburg, while baby boy Ke Nako was born to teenage mother Busiswa Landiso and her 21-year-old boyfriend Samuel Ntshiwa, who both are from Bloemfontein.
Another couple in Bloemfontein had twin boys during the opening match between South Africa and Mexico and decided to name their kids after the two teams playing.
Bafana (South Africa's nickname is Bafana-Bafana) and Mexico Venter were born during the 1-1 draw at Soccer City.
Their new dad, Charl (29) said: ''I'm giving them those names as a token of my willingness to know more about the game.
"My wife, Riana (26), and I knew in December that we would have twins but for them to be born on this day was a wonderful surprise."
FIFA spokeswoman Delia Fischer wished all the World Cup babies and their families the best.
- South Africa