father predecessor successor title article_title name reign
alexander michael asen i mitso asen Еmperor of bulgaria kaliman asen ii of bulgaria
 kaliman asen ii 1256
kaliman asen ii of bulgaria

kaliman asen ii -lrb- -rrb- , or commonly , but less accurately koloman asen ii , ruled as emperor -lrb- tsar -rrb- of bulgaria for a short time in 1256 .
the year of his birth is unknown .
kaliman asen ii was the son of `` sebastokrator '' alexander , who was the younger brother of ivan asen ii of bulgaria .
kaliman asen ii 's mother is unknown , and attempts to identify her as a serbian princess are based on the erroneous identification of kaliman asen ii with the `` sebastokrator '' kaloyan , who was still alive in 1258/59 .
in 1256 kaliman asen murdered his first cousin michael asen i during a hunting party in the environs of the capital tărnovo and usurped the throne .
in the process he married michael asen i 's widow , the unnamed daughter of rostislav mihailovich , but he was unable to maintain himself on the throne .
rostislav advanced on tărnovo from belgrade , and kaliman asen ii fled the capital .
rostislav returned home with his daughter and claiming the title of emperor of bulgaria , while a brother-in-law of michael asen i , mitso asen took the throne .
in the meantime , kaliman asen ii had been murdered after being abandoned by most of his supporters .
