Elon Musk Has A Secret Third Child With Grimes Named Techno Mechanicus, Reveals Biography

However, not much is known about him or when he was born, and his identity has been a closely guarded secret.

Elon Musk and his ex-partner Grimes share three children, not two as previously believed, according to a new biography about the Tesla CEO, Independent reported. 

According to The New York Times' review of Elon Musk's biography, set to be released on September 12, Mr. Musk and Ms. Grimes welcomed a third child, a son named Techno Mechanicus, who also goes by ''Tau.'' However, not much is known about him or when he was born, and his identity has been a closely guarded secret.

Mr Musk now has ten known biological children with three different women.