Gustavus Dragan Bismarck (July 23, 1923 - February 11, 2019) was a Chawosaurian Sorcerer who was a son of former Prime Minister of Chawosauria, Jonathan Dragan Bismarck XVII, and former First Lady of Chawosauria, Elizabeth Molly McDonald.

A half-blood wizard, he was an Auror for the British Ministry of Magic after becoming a British civilian to escape his father's abuse.