The news was made known by her sister, Venus at the French open in Stade Roland-Gaross,Paris, France, while she was in a short interview with Eurosport, saying: "I want to be known as the favorite aunt".
According to Dailymail, Venus who was asked about the baby in the interview on wednesday, where she referred to the baby as 'she' said she wanted the tot to be named after her.
Serena Williams had earlier announced back in April that she's expecting her first child. She also said she still did not know the gender of her baby.
Talking at the Met Gala on May 1, she said: 'We're waiting. it's a surprise. We call it "baby,"' she said.
Serena recently revealed that she had actually accidentally announced her pregnancy.
The star confessed the snapchat which revealed she was 20 weeks along was sent by mistake.