Rondane is the finite plural of the word rond. Several mountains in the area have the ending -ronden (Digerronden, Høgronden, Midtronden, Storronden and Vinjeronden), and this is the finite singular of the same word. The word rond was probably originally the name of the long and narrow lake Rondvatnet ('Rond water/lake') - and the mountains around were then named after this lake. For the meaning see under Randsfjorden.