Ivan Asen I of Bulgaria

Ivan Asen I, also known as Asen I, Ioan Asen Belgun or John Asen I, was emperor or tsar of Bulgaria from 1187/1188 to 1196 as co-ruler with his elder brother, Peter II. Hailing from the Byzantine theme of Paristrion, his exact place and date of birth are unknown. Most contemporaneous chronicles describe Asen and his brothers, Theodor (Peter) and Kaloyan, as Vlachs but they were most likely of mixed Bulgarian, Cuman and Vlach ancestry.