Adventure Comics #287 (June 1961) introduces the story of Dev-Em, a super-bratty teenager who lived on Krypton and used to babysit Kal-El. Dev-Em has a habit of getting into trouble by stealing technology and inventions from the Jor-El’s laboratory.
When he discovers Jor-El’s prediction of the end of Krypton, he steals technology to build himself a suspended animation container for him and his parents. When Krypton explodes, Dev-Em’s family is ejected into space under suspended animation. Years later he wakes up to discover that Kal-El escaped Earth and that many years have passed. This makes him really angry for some reason and he smashes a boulder…
This is a 2-parter, we will have to learn what mischief Dev-Em gets up to in the next issue of Adventure Comics.
Known surviving Kryptonians: 1,000,012 (At this point I’m assuming that Dev-Em and his parents survive).