Sisyphus

King of Corinth in classical mythology, famed as "the craftiest of men," he was condemned in the afterlife to roll uphill a stone which perpetually rolls down again; from Latinized form of Greek Sisyphos, a name of unknown origin. Liddell & Scott suggest a reduplication of syphos "the crafty" (with Aeolic -u- for -o-), but Klein calls this folk-etymology.