The closest thing I can think would just be to edit the sim's first/last names to include the title.
For example, have the first name be "King (firstname)" or "General (firstname)" instead of just "(firstname)". Similarly, have the last name be "(lastname) the Witch" instead of just "(lastname)".
You can use Nraas MasterController to rename sims using the "Basic/Rename" interaction:
http://nraas.wikispaces.com/MasterController