Helen, also known by the name Gruba/Груба, ruled the Kingdom of Bosnia from September 1395 until late April or early May 1398. She was queen consort as the wife of King Dabiša, and was chosen by the stanak to rule after his death. Whether she was a regent who ruled during an interregnum or a queen regnant is disputed, but in any case the real power was held by magnates of the kingdom. Her rule ended with the election of King Ostoja.

Stephen Dabiša was as a member of the Kotromanić dynasty who reigned as King of Bosnia from March 1391 until his death. Elected to succeed the first king, Tvrtko I, Dabiša at first maintained the integrity of the Kingdom of Bosnia. He successfully resisted Hungary, Naples, and even Ottoman Turks. The latter part of his reign, however, saw the ascent of magnates and considerable loss of Bosnia's territory and influence.