From college sweetheart to co-parenting with tech executives, Elon Musk's romantic journey has been as eventful as his business ventures.

Grimes criticized her ex Elon Musk after he brought their son X Æ A-Xii to a press conference with President Donald Trump at the White House Oval Office.

Reporters asking Mr Musk questions also turned attention to his four-year-old, named X Æ A-Xii, who was captured making faces as he clung to his father's shoulders. And, at one point, Musk’s son was ...