Sieur Dubois
 Sieur Dubois and Sieur D. B. are the pseudonymous names of a traveller who reached the islands of Madagascar and Réunion at the time of early colonization by France. He wrote a book in French published in 1674 about his journeys and the wildlife he saw including details of several species of birds endemic to Réunion that have since become extinct such as the Réunion Ibis Réunion Swamphen and Réunion Rail.