Catherine of Bosnia, Countess of Cilli

Catherine of Bosnia (Katarina Kotromanić, born c. 1336) was a Kotromanić princess, generally held to be a daughter of Ban Stephen II. In 1361 she married Hermann I, Count of Celje. Her elder son Hans died young; Hermann II succeeded as count and in 1427 was recognized as heir presumptive to the Bosnian throne.

Through Hermann’s daughter Barbara, wife of Emperor Sigismund, Catherine was an ancestress of later European royal houses. She died after 1400.