Tesla CEO Elon Musk had twins with Shivon Zilis, one of the top employees of his company, Neuralink.

36-year-old Zilis is the mother of the billionaire's eighth and ninth children.

According to court documents, Musk and Zilis filed a plea in April 2022 to change the name of their kids.

Elon and Zilis want their children to have the same last name as their father and make their mother's surname their middle name.

Zilis, age 36, is recognized on his LinkedIn profile as director of operations and special projects at Neuralink, which is co-founded by Musk.

Prior to that, she worked at OpenAI, a non-profitable co-founded by Musk, and was a project director at Tesla.

Shivon Zilis started working at the company in May 2017, and after that, she worked as a project director in artificial intelligence at Tesla, where she worked until 2019.