Division of the Afsharid Empire
After Nader Shah was assassinated in 1747, his nephew Ali Qoli (who may have been involved in the assassination plot) seized the throne and proclaimed himself Adel Shah (meaning: The Just King). He ordered the execution of all of Nader's sons and grandsons, with the exception of the 13-year-old Shahrokh, the son of Reza Qoli Mirza Afshar.
Source: Wikipedia — Division of the Afsharid Empire (CC BY-SA 4.0)