Governor of Khalifatabad, under Nasir-ud-din Mahmud Shah
Little is known of Khan Jahan beyond legend and the plain words of his own tomb. The Bengal District Gazetteer states: "It appears certain, however, that he was the Governor of this part of the country in the time of Nasir-ud-din Mahmud Shah (1442-59)" (p. 27). The tract he governed, centred on Bagerhat, took its name from his own office: "The tract of country round Bagherhat, over which Khan Jahan ruled, was known as Khalifatabad, i.e., the clearance of the Viceroy (Khalifa)" (p. 28). Beyond this the gazetteer credits him, by popular tradition, with the mosque at Bagerhat itself: "we may accept as true the popular tradition that, besides his own mausoleum, he erected the mosque at Bagherhat which now goes by the name of the Satgumbaz" (p. 27).
The tomb inscription, 863 AH
His own tomb carries a dated record of him. A triangle on the south side of the sarcophagus stone reads: "This tomb is a part of the garden of Heaven for the great Khan, Khan Jahan. God be merciful to him. Written on the 26th Zil Hijjah in the year 863" (p. 165) — a date the gazetteer converts to "the 23rd of October 1459" (p. 165). A second inscription gives death and burial as separate days: "He left this world for a better one on the night of Wednesday, 26th Zil Hijjah, and was buried on Thursday, the 27th of the same month in the year 863" (p. 166). The name popularly given him, Khan Jahan Ali, is not what the tomb itself records: "in the inscription on his tomb he is simply referred to by his title Khan Jahan" (p. 27).