Pål Tyldum - cross-country skier in the 1970s, won the 50 km in 1976 Olympics
Jon Åge Tyldum - biathlete in the 1990s, two time overall World Cup winner
Johan Sætre - ski jumper in the early 1980s
Lasse Sætre - speed skater in the late 1990s, 2000s, olympic bronze on the 10k
And there's all the Flos (Tore Andre, Jostein, Håvard) - but they're all related, come from the some inbred village in the thickest of Sogn.
Moving away from Norway, there's
three unrelated cricketers by the name Gillespie: Jason (Oz, mullet), Mark (NZ, fast and thus crocked) and Peter (Ireland)
Ed Moses is a good one too: one totally unbeaten hurdler and one breaststroke swimmer with world records on the short course.