A source close to the couple confirmed that Luna's middle name, Simone, is a nod to the late singer and civil rights activist Nina Simone, whom Legend admires.
Over the weekend, ET caught up with Underground producer Mike Jackson, who confirmed the new parents were doing well and have returned home with Luna. "They’re doing great. They're happy. They're elated," he said. "It's a long time coming. They went through a lot to have this child. They're excited. We're all really blessed to have her a part of all our lives."