Ali IV Kalirgima

Ali IV Kalirgima
Mai of the Kanem–Bornu Empire
Reign18th century (40–46 years)
c. 1750–1791
PredecessorDunama VIII Gana
SuccessorAhmad Alimi
Died1791 (1792)
Ngazargamu, Bornu (?)
SpouseAmina
IssueAhmad Alimi
Muhammad IX Ngileruma
DynastySayfawa dynasty
FatherHamdan Dunamami
MotherFanna

Ali IV (ʿAlī bin Ḥamdūn), called Ali Kalirgima, Ali Gulmi, Ali Dunamami, and Ali Fannami, was mai (ruler) of the Kanem–Bornu Empire in the second half of the 18th century, ruling approximately 1750–1791. Ali is remembered for a series of unsuccessful wars against the Mandara Kingdom to the southwest, which greatly weakened the empire's armies.