But not his last name, face, childhood, and more.
He's blonde, his face is stone-jawed, he has blue eyes, his skin is extremely pale. He spent his childhood as a normal kid, but it was cut short when Halsey had him abducted for the SPARTAN-II project. He doesn't have a last name, all SPARTAN-II candidates had their last names dropped entirely. His full name is John-117. His life before SPARTAN is trivial, he was abducted when he was like 10 or 12.