Addendum:

The following personages appear in other stories of the Human Comedy.

Chaulieu, Eleonore, Duchesse de
  Letters of Two Brides
Grandet, Victor-Ange-Guillaume
  The Firm of Nucingen
Grandet, Charles
  The Firm of Nucingen
Keller, Francois
  Domestic Peace
  Cesar Birotteau
  The Government Clerks
  The Member for Arcis
Lupeaulx, Clement Chardin des
  The Muse of the Department
  A Bachelor's Establishment
  A Distinguished Provincial at Paris
  The Government Clerks
  Scenes from a Courtesan's Life
  Ursule Mirouet
Nathan, Madame Raoul
  The Muse of the Department
  Lost Illusions
  A Distinguished Provincial at Paris
  Scenes from a Courtesan's Life
  The Government Clerks
  A Bachelor's Establishment
  Ursule Mirouet
  The Imaginary Mistress
  A Prince of Bohemia
  A Daughter of Eve
  The Unconscious Humorists
Nucingen, Baronne Delphine de
  Father Goriot
  The Thirteen
  Cesar Birotteau
  Melmoth Reconciled
  Lost Illusions
  A Distinguished Provincial at Paris
  The Commission in Lunacy
  Scenes from a Courtesan's Life
  Modeste Mignon
  The Firm of Nucingen
  Another Study of Woman
  A Daughter of Eve
  The Member for Arcis
Roguin
  Cesar Birotteau
  Eugenie Grandet
  A Bachelor's Establishment
  The Vendetta