Elon Musk’s ever-growing brood of children has expanded once again after he confirmed the arrival of a new son named Seldon Lycurgus.

Shivon Zilis, the Neuralink executive who already has three children with Elon Musk, took to the billionaire’s preferred social media platform on Friday to announce that the pair had welcomed a fourth child into the world: Seldon Lycurgus.

Elon Musk and Shivon Zilis have welcomed their fourth child, a baby boy named Seldon Lycurgus. Zilis confirmed the birth in a social media post while celebrating their twins, Strider and Azure, on their second birthday.