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

Note: The Two Brothers is also known as A Bachelor's Establishment and The Black Sheep. In other Addendum appearances it is referred to as A Bachelor's Establishment.

Bianchon, Horace Father Goriot The Atheist's Mass Cesar Birotteau The Commission in Lunacy Lost Illusions A Distinguished Provincial at Paris The Secrets of a Princess The Government Clerks Pierrette A Study of Woman Scenes from a Courtesan's Life Honorine The Seamy Side of History The Magic Skin A Second Home A Prince of Bohemia Letters of Two Brides The Muse of the Department The Imaginary Mistress The Middle Classes Cousin Betty The Country Parson In addition, M. Bianchon narrated the following:

Another Study of Woman La Grande Breteche Birotteau, Cesar Cesar Birotteau At the Sign of the Cat and Racket Bixiou, Jean-Jacques The Purse The Government Clerks Modeste Mignon Scenes from a Courtesan's Life The Firm of Nucingen The Muse of the Department Cousin Betty The Member for Arcis Beatrix A Man of Business Gaudissart II.

The Unconscious Humorists Cousin Pons Brambourg, Comte de (Title of Philippe Bridau, later Joseph) The Unconscious Humorists Bridau, Philippe Scenes from a Courtesan's Life Bridau, Joseph The Purse A Distinguished Provincial at Paris A Start in Life Modeste Mignon Another Study of Woman Pierre Grassou Letters of Two Brides Cousin Betty The Member for Arcis Bruel, Jean Francois du The Government Clerks A Start in Life A Prince of Bohemia The Middle Classes A Distinguished Provincial at Paris A Daughter of Eve Bruel, Claudine Chaffaroux, Madame du A Prince of Bohemia A Distinguished Provincial at Paris Letters of Two Brides The Middle Classes Cabirolle, Madame A Start in Life Cabirolle, Agathe-Florentine A Start in Life Lost Illusions A Distinguished Provincial at Paris Camusot A Distinguished Provincial at Paris Cousin Pons The Muse of the Department Cesar Birotteau At the Sign of the Cat and Racket Cardot, Jean-Jerome-Severin A Start in Life Lost Illusions A Distinguished Provincial at Paris At the Sign of the Cat and Racket Cesar Birotteau Chaulieu, Henri, Duc de Letters of Two Brides Modest Mignon Scenes from a Courtesan's Life The Thirteen Chrestien, Michel A Distinguished Provincial at Paris The Secrets of a Princess Claparon, Charles Cesar Birotteau Melmoth Reconciled The Firm of Nucingen A Man of Business The Middle Classes Coloquinte A Distinguished Provincial at Paris Coralie, Mademoiselle A Start in Life A Distinguished Provincial at Paris Desplein The Atheist's Mass Cousin Pons Lost Illusions The Thirteen The Government Clerks Pierrette The Seamy Side of History Modest Mignon Scenes from a Courtesan's Life Honorine Desroches (son)