The original proposal for the naming of Nix was to use the classical spelling Nyx, but to avoid confusion with the asteroid 3908 Nyx, the spelling was changed to Nix, the Egyptian spelling of the name.
A proposta inicial era utilizar a grafía clásica Nyx, pero para evitar confusións co asteroide 3908 Nyx, esta nomenclatura foi cambiada pola forma exipcia deste nome grego.