Tesla CEO Elon Musk and Shivon Zilis, a top executive at his brain-chip start-up Neuralink, had twins in November 2021, Business Insider reported.

In April, Musk and Zilis filed a petition to alter the name of the twins to “have their father’s last name” and include their mother's last name as a part of their center name, the report said, citing court documents. A month later, a Texas judge approved the petition, the report added.

A court docket summary on the Westlaw legal research service showed a judge signed an “order changing the names of multiple children” on 11 May after the name change petition from Musk and Zilis made on 25 April this year.

The report said, without citing any source, that Zilis has recently been floated as one of the people Musk could tap to run Twitter after his US$44-billion deal acquisition.

The news of the twins’ arrival brings Musk’s total count of children to nine. Musk shares two children with Canadian singer Grimes, and other five kids with his ex-wife Canadian author Justine Wilson.