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.

Elon Musk has welcomed a fourth kid with partner, Shivon Zilis, a Neuralink executive as the latter announced the unusual name of their son, 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.