What identities does Dr. Jerome Dupont assume over the course of the novel, Alias Grace?

Dr. Jerome Dupont is a charlatan. He takes on several different disguises. He first appears in the story as Jeremiah the Peddler. He is somewhat infatuated with Grace but not to the point of getting married. He asks Grace to leave the Kinnear place and travel with him. He returns later as Dr. Jerome Dupont, a hypnotist. He tells Grace not to give him away. Then he puts her into a trance. Later, Grace sees a poster advertising a circus and recognizes his face.