 The Shishmanids were related to the earlier Asen dynasty, and according to the Ragusan historian Lukarić, also to the immediately preceding Terter dynasty.In Plamen Pavlov's view, the Shishman dynasty's founder, despot Shishman of Vidin, may have been the brother of George I, the first Bulgarian Terterid ruler, thus also coming to Bulgaria from the Kingdom of Hungary after 1241.Among its more notable members were