 Kosara

Kosara or Cossara was a Bulgarian noblewoman, related to Tsar Samuel of Bulgaria, who was married to Prince Jovan Vladimir of Duklja.The 11th-century Byzantine historian John Skylitzes calls her a daughter of Tsar Samuel of Bulgaria, but the annotations to Skylitzes of Michael of Duklja correct this by interpolating that her father was called Theodoretos.