For the two small lakes in the headwaters of the Upukerora River (midway between the lakes)
Acheron is taken from the name in Greek mythology, has an association with Mt Cerberus, also located in the Livingstone Mountains area. Cerberus was the 3 headed dog who guarded the entrance to Hades, Acheron was the shallow lake or river across which one had to go to enter Hades.
NZTM2000: 1214517, 4986995
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