There are 5 unique codex entries in the Persons of Note section on Dromund Kaas. They are all class specific.
Darth Jadus (Agent) is obtained from speaking with Darth Jadus during "Dark Meeting" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Imperial Agent
Associated Achievement: None
Darth Thanaton (Inquisitor) is obtained from speaking with Darth Thanaton during "Sith Hierarchy" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Inquisitor
Associated Achievement: None
Intelligence Profile: Hunter (Agent) is obtained from speaking with Minister of Intelligence during "The Hidden Throne" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Imperial Agent
Associated Achievement: None
Lord Draahg (Warrior) is obtained from speaking with Lord Draahg during "Power Play" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Warrior
Associated Achievement: None
Master Nomen Karr (Warrior) is obtained from speaking with Darth Baras during "An Ancient Answer" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Warrior
Associated Achievement: None