There are 8 unique codex entries in the Persons of Note section on Alderaan. 1 is accessible to all players regardless of class or faction, and 7 are class specific.
Bouris Ulgo is obtained from speaking with Queensguard Captain during "Regicide" mission as an Imperial player or Bouris Ulgo during "Usurper" mission as a Republic player.
Codex type: Persons of Note | Faction: Both | Class: All
Associated Achievement: None
Captain Cormac (Trooper) is obtained from speaking with Captain Cormac during "Prisoner of War" mission.
Codex type: Persons of Note | Faction: Republic | Class: Trooper
Associated Achievement: None
General Gesselle Organa (Warrior) is obtained from speaking with Duke Kendoh during "Knock Knock" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Warrior
Associated Achievement: None
Intelligence Profile: Vector Hyllus (Agent) is obtained from speaking with Vector Hyllus during "The Assassin's Prize" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Imperial Agent
Associated Achievement: None
Lord Nefarid (Knight) is obtained near a proximity map trigger during "Facing Lord Nefarid" mission.
Codex type: Persons of Note | Faction: Republic | Class: Jedi Knight
Associated Achievement: None
Markus Thul (Trooper) is obtained from speaking with Markus Thul during "Prisoner of War" mission.
Codex type: Persons of Note | Faction: Republic | Class: Trooper
Associated Achievement: None
Nomar Organa (Inquisitor) is obtained from speaking with Elana Thul during "The Secrets of the Jedi" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Inquisitor
Associated Achievement: None
Rehanna Rist (Inquisitor) is obtained from speaking with Rehanna Rist during "A Woman Scorned" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Inquisitor
Associated Achievement: None