イヴァン・アセン
Ivan Asen III (, also Йоан Асен III, "Ioan Asen III", and in English "John Asen III"), ruled as tsar of Bulgaria 1279–1280. Ivan Asen III was the son of Mitso Asen of Bulgaria and Maria of Bulgaria, a daughter of Ivan Asen II of Bulgaria and Irene of Thessalonica. He was probably born in about 1259/60, and died in exile in 1303.