There are 6 unique codex entries in the Persons of Note section on Makeb. 1 is accessible to all players regardless of class or faction, 4 are faction specific, and 1 is unobtainable.
Darth Marr is obtained from speaking with R-C92 during "Countdown to Doomsday" mission.
Codex type: Persons of Note | Faction: Imperial | Class: All
Associated Achievement: None
Supreme Chancellor Saresh is obtained from speaking with ZAN-3L0 during "Trouble in Paradise" mission. It is obtained with the State of the War: Imperial Retrenchment codex.
Codex type: Persons of Note | Faction: Republic | Class: All
Associated Achievement: None
Szajin, the Hutt Archon is obtained from interacting with the Isotope-5 Storage Tank during "Stealing Thunder" mission.
Codex type: Persons of Note | Faction: Imperial | Class: All
Associated Achievement: None
The Avesta Family is obtained from interacting with a Clickable Plaque.
Codex type: Persons of Note | Faction: Both | Class: All
Associated Achievement: None
Toborro the Hutt is obtained from speaking with Shalim Avesta during "Trouble in Paradise" mission.
Codex type: Persons of Note | Faction: Republic | Class: All
Associated Achievement: None
Under-Moff Bensen is unobtainable.
Codex type: Persons of Note | Faction: Imperial | Class: All
Associated Achievement: None