Shishman of Vidin
Shishman (fl. from the 1270s, died before 1313) was a Cuman boyar in Bulgaria who ruled a semi-independent realm from the Danubian fortress of Vidin. He was made despot by Tsar George Terter I. In 1291 he accepted Golden Horde suzerainty, and in 1292 he led an unsuccessful invasion of Serbia.
The Serbs retaliated by taking Vidin, but he was restored as a Serbian vassal and kept his lands effectively independent until his death. Through his son Michael Shishman, who seized the Bulgarian throne in 1323, he was the progenitor of the Shishman dynasty.