Muhammad bin Tughluq
The Ghiyas tomb has three graves. The central grave is known to be that of Ghiyas-ud-Din Tughluq, other two belong to his son, Muhammad bin Tughluq and his wife, Makhdum-i-Jahan. The grave of Makhdum-i-Jahan must have been added later. There are no epigraphs of any sort.