On Dec. 31, 2018, Martin announced on Instagram that he and Yosef had become parents to an adorable baby girl named Lucia. In the caption of a photo of Martin and Yosef holding little Lucia's hands, the singer wrote: "We are beyond happy to announce that we have become parents to a beautiful and healthy baby girl, Lucia Martin-Yosef. It has been a special time for us and we cant wait to see where this stellar baby will take us. Both her beautiful brothers, me and Jwan have fallen in love with Lucia." Yosef tends to refer to his daughter as "Lulu," while Martin has called Lucia "La luz de mis ojos," or "The light of my eyes."
