Khayrkhah Harati, Muhammad Reza b. Sultan Husayn Ghuriani, Nizari Ismaili da‘i, author, and poet. He was born into a prominent Nizari Ismaili family in Ghurian near Harat, in present day western Afghanistan, in the final decades of the 15th century CE and died not long after 960 AH/1553 CE, the latest date cited in his writings. Khayrkhah thus lived during the first century of the so-called Anjudan revival in Nizari Ismaili da‘wa activities after the collapse of the Nizari centres of power in Persia in 654 AH/1256 CE.