Jonathan Dragan Bismarck XV (January 31, 1790-December 31, 1895) was a Chawosaurian Wizard, a member of the Bismarck family, and a Hogwarts Chawosaurian. Bismarck was the grandfather of former Chawosaurian Prime Minister Jonathan Dragan Bismarck XVII.

He was a huge supporter for the Slytherin House, giving him the nickname Slytherin Bismarck.