Rubuta ci gaba don wannan sakin layi - Konstantin (Kostadin) Dejanović (; 1365-95) ya kasance mai mulkin Serbia wanda ya mallaki babban lardin a gabashin Macedonia a ƙarƙashin mulkin Ottoman, a lokacin faduwar Daular Serbia. Ya gaji babban ɗan'uwansa Jovan Dragaš, wanda ya kasance mai mulkin Ottoman tun lokacin yakin Maritsa
(1371) wanda ya lalata wani ɓangare na masarautar Serbia. 'Yan'uwan suna da gwamnatinsu kuma suna yin tsabar kudi bisa ga tsarin Nemanjić. 'Yarsa Jelena ta auri Sarkin Byzantine Manuel II Palaiologos a cikin 1392. Ya fadi a yakin Rovine (17 ga Mayu 1395), yana yiwa Ottomans aiki a kan Wallachia, yana yaƙi tare da manyan Serbian Stefan Lazarević da Marko Mrnjavčević.