Possible Clues:

• To whom Brabantio says 'Thou art a villain'
• He has more lines than the title character
• 'Othello' foe
• ''I lack iniquity'' speaker
• "O, beware, my lord, of jealousy" speaker
• ''Aladdin'' parrot
• Betrayer of Othello
• Manipulator of the Moor
• Plotter in "Othello" or "Aladdin"
• The villain in Shakespeare's 'Othello'