Levinius system

From Memory Alpha, the free Star Trek reference

The Levinius system is a star system which contains the planet named Levinius V. (TOS: "Operation -- Annihilate!")

A deleted scene from ENT: "Fight or Flight" makes a reference to what the subtitles label as "Livinius". It is possible that this was a reference to the Levinius system as an homage to the planet mentioned in TOS: "Operation -- Annihilate!".