There are 6 unique codex entries in the Persons of Note section on Tatooine. They are class specific.
Andronikos Revel (Inquisitor) is obtained from speaking with Andronikos Revel during "Andronikos Revel" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Inquisitor
Associated Achievement: None
Gault Rennow (Bounty Hunter) is obtained from speaking with Tyresius Lokai during "Catching a Slippery Eel" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Bounty Hunter
Associated Achievement: None
Lord Praven (Knight) is obtained from speaking with the Personal Holocom during "Race Against Doom" mission.
Coordinates: 895, -2384 | 615, -2755 | 389, -2404
Codex type: Persons of Note | Faction: Republic | Class: Jedi Knight
Associated Achievement: None
Mayor Klerren (Trooper) is obtained from speaking with Mayor Klerren during "Local Resources" mission.
Codex type: Persons of Note | Faction: Republic | Class: Trooper
Associated Achievement: None
Sharack Breev (Warrior) is obtained from speaking with Sharack Breev during "Seek Answers" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Warrior
Associated Achievement: None
The Lady of Pain (Bounty Hunter) is obtained from speaking with Lady of Pain during "A Barter with the Lady of Pain" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Bounty Hunter
Associated Achievement: None