|Hair:||Gray (formerly sandy blond)|
|Relatives:|| Martha Kent (wife)|
Clark Kent (adopted son)
Jonathan and his wife Martha witnessed the arrival of the Kryptonian spacecraft bearing the infant Kal-El. He agreed to Martha's suggestion that they raise the child as their own.
Over the years, Jonathan and Martha's loving, supportive parenting instilled in young Clark a strong sense of morality and the importance of helping those in need—thus providing Superman with an essential heroism to match his vast physical power.
Years later, Jonathan suffered a heart-attack when he was cutting hay at his farm, while at the same time Clark had rushed to save a family in a car crash. By the time Clark reached him, he was dying, and with his final breath told his adoptive son that he knew he had been sent to them for a reason, although regretted not being able to tell him. This memory would haunt Clark for years to come, although he'd come to terms with it.
Jonathan's spirit was met by Jean Grey's friend Annie Richardson, after she was finally freed from her psyche when Jean and the Phoenix were able to come to terms, thus allowing her to go to the afterlife in peace. Jonathan asked Annie to tell Jean to deliver a message to his son, that he was very proud of him.