Iltutmish (reign: 1211-1236) was one of the slaves of Qutb-ud-din Aibak who later became his Son-in-Law. He was from the Ilabari tribe of the Turks and that is why some scholars call the slave dynasty has Ilabari dynasty. Chihalagani/ Chalisa/ Corp of Forty The Ilabari tribe used to have administrative & military elite called “Chihalgani” or the “Corp