Mustafa Celalettin Pasha, born as Konstanty Borzęcki (April 10, 1826 in Modrzewiec, Piotrków County – 1876 in Novoselë, Kolonjë), was a participant in Polish uprisings and later an Ottoman pasha, a strategist, and a writer.
He was the great-grandfather of Nâzım Hikmet[1] and Oktay Rıfat Horozcu.
After the fall of the uprising, he emigrated to the Ottoman Empire, where he enlisted in the army.
There he adopted a new name, Mustafa Celalettin Pasha, and was circumcised and converted to Islam in 1849.
His body was placed in a mosque in Albania, where he was buried as a Ottoman hero.