There are 2 unique codex entries in the Achievement: Titles section on Quesh. They are unobtainable.
the Venomous is unobtainable.
Codex type: Achievement: Titles | Faction: Imperial | Class: All
Associated Achievement: None
Venom Drinker is unobtainable.
Codex type: Achievement: Titles | Faction: Republic | Class: All
Associated Achievement: None