Celebrity Parents Oprah Winfrey Says Gayle King's Grandson Luca, 8 Months, Might Say Her Name First King's daughter Kirby Bumpus welcomed baby Luca with her husband Virgil Miller in September By BreAnna Bell BreAnna Bell Digital News Writer, PEOPLE People Editorial Guidelines Published on May 24, 2022 07:47 PM Share Tweet Pin Email Oprah Winfrey has an idea of who Gayle King's grandson Luca Miller might call on first. On Tuesday's episode of The Ellen DeGeneres Show, the Color Purple producer told host Ellen DeGeneres that her friend King wants to be called "Gaia" by 8-month-old Luca — which is arguably harder to say than "O." "Gaia...means Mother Earth," Winfrey, 68, explained of King's nickname. "I say [to her], 'You're not Mother Earth. You're not mother of the earth, you're just one grandmother.' " Oprah Winfrey Visits Set of Color Purple Movie Musical: 'This Ain't Your Mama's Color Purple' Gayle King and Oprah Winfrey. Dimitrios Kambouris/Getty Images; Michael Tran/FilmMagic Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. "Babies decide for themselves what they wanna call you," added Winfrey. "I have to tell you though, every time I see the baby — which I see the baby more than she does — every time I see the baby, I'm like 'O... O... Auntie O.' " Winfrey said she feels the baby is going to say "Auntie O" before "Gaia," noting: "It's so easy to say 'Auntie O.' " Oprah Meets Gayle King's Grandson for First Time with Chants and Cheers: 'I've Been Waiting' King's daughter Kirby Bumpus, 32, welcomed baby Luca alongside her husband Virgil Miller in September. Winfrey celebrated Mother's Day earlier this month with both Bumpus and King, 67. She shared a photo of the three women, including the new baby, over the holiday weekend, honoring mothers of all kinds in a lengthy caption. RELATED VIDEO: Oprah Winfrey and Gayle King on Being 'Like Sisters': "She Became All the Things I Had Never Had" "Becoming a mother is the choice to become one of the greatest spiritual teachers there is. They create an environment that's stimulating and nurturing, pass on a sense of responsibility to another human being, and raise a child who understands that they are created from good and are capable of anything," she wrote. "Happy Mother's Day to all the moms who have created a template to motherhood (like @gayleking), new moms who are guiding their kids through the world (like @kirbybump), and mothers who did not biologically have kids but are still mother figures to many. Today — and every day — we honor you," added Winfrey.