Tvrtko I of Bosnia
Ban Tvrtko I of Bosnia, another vassal of King Louis, probably first heard about Dorothea during her captivity in Croatia. Louis eventually suggested that Tvrtko marry her. The negotiations were carried out by Louis on Dorothea's behalf. The marriage that made Dorothea Banness of Bosnia was celebrated in Hungarian-held Syrmia in early December 1374, either in Đakovo or in Ilinci; the wedding festivities doubtlessly took place in Ilinci.