Iltutmish had groomed his eldest son Nasiruddin Mahmud to be his successor, but this son died unexpectedly in 1229. While leaving for his Gwalior campaign in 1231, Iltutmish left his daughter Razia as the in-charge of Delhi's administration.
Iltutmish groomed his eldest son Nasiruddin Mahmud to be his successor but he died unexpectedly in 1229.  While on his way to Gwalior in 1231, Iltutmish left his daughter Razia in charge of Delhi's administration.