D'Argo Sun-Crichton or "Deke" was the son of John Crichton and Aeryn Sun. He was born during the final battle of the Peacekeeper/Scarran War while his parents were in the midst of the battle. He was named in honor Ka D'Argo, the close friend of his parents, who perished as they fled the battle. Not long after the war, John convinced Aeryn to nickname D'Argo "Deke", both for his initials D.C., and for Mercury astronaut Deke Slayton, as well as the fact that John was uncomfortable calling him D'Argo so soon after the death of his namesake.