Ivan Asen I, also known as Asen I 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. Wikipedia
Died: 1196, Veliko Tarnovo, Bulgaria
Great grandchildren: Ivan Asen III of Bulgaria, Irene Doukaina Laskarina, John IV Laskaris, and more
Children: Ivan Asen II and Peter II of Bulgaria
Grandchildren: Michael II Asen, Kaliman I of Bulgaria, Kaliman Asen II of Bulgaria, and more
Spouse: Elena-Evgenia, wife of Ivan Asen I (m. 1183–1196)