Possible Clues:

• Sigmund or Anna
• Psychoanalysis pioneer
• Slip eponym
• "The Interpretation of Dreams" author
• "The Ego and the Id" author
• Psychoanalyst Sigmund
• 'The Ego and the Id' author
• Anna who was an early pioneer of psychoanalytic child psychology
• Psychoanalyst
• "On Narcissism" author