Marquis de Sade
The word "sadism" originates from the works of Donatien Alphonse François, Marquis de Sade, and the word "masochism" originates from Leopold von Sacher-Masoch, the author of "Venus in Furs". However, it is worth noting that the Marquis de Sade describes non-consensual abuse in his works, such as in "Justine". "Venus in Furs" describes a consensual dom-sub relationship.