Kalapahada (in Odia language) or Kala Pahar was a Brahmin born[1][2] Muslim General of the Bengal Sultanate under the reigning Karrani Dynasty.
[3] According to historical accounts, Kalapahad, a military commander, converted to Islam primarily because of his marriage to a Muslim woman named Jahanara, which led him to embrace the Islamic faith in order to win her hand and solidify his position within the ruling Muslim elite of Bengal; this conversion is often associated with his change in name from Kalachand Roy to "Mohammad Farmal.".
[4] He also successfully fought the Cooch Behar army after the Koch king had attacked the Sultanate; Sukladhwaja was imprisoned and the capital seized.
Kalapahar rallied around Daud Karrani who ascended to the throne of the Bengal Sultanate but were defeated at Battle of Rajmahal in July 1576.
In March 2021, the Indian Minister of Home Affairs Amit Shah referred to AIUDF leader Badruddin Ajmal as Kalapahad and as an infiltrator.