Ala-ud-Din Hasan Bahman Shah whose original name was Zafar Khan or Hasan Gangu, was the founder of the Bahmani Sultanate.

The Bahmani Sultanate was a late medieval Muslim empire that ruled the Deccan Plateau in India. The Bahmani Sultanate came to power in 1347 during the Rebellion of Ismail Mukh against the Tughlaq dynasty of Delhi after Ismail Mukh abdicated in favour of Zafar Khan, who would establish the Bahmani Sultanate. The Bahmani Sultanate was in perpetual war with its neighbors, including its rival to the south, the Vijayanagara Empire.