Ivan Asen II of Bulgaria
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.