Swedish cross-country skier and four-time Olympic gold medalist who competed in three Olympics, medalling in all of them.
He worked as a blacksmith and lumberjack before skiing became his main profession.
He won a total of nine Olympic medals.
His son Edy Jernberg also skied competitively.
He competed in the 1964 Olympics where speed skater Lidiya Skoblikova won four gold medals.