François Sébastien Charles Joseph de Croix, Count of Clerfayt, Austrian field marshal (d. 1798)
François Sébastien Charles Joseph de Croix, Count of Clerfayt (14 October 1733 – 21 July 1798), a Walloon, joined the army of the Habsburg Monarchy and soon fought in the Seven Years' War. Later in his military career, he led Austrian troops in the war against Ottoman Turkey. During the French Revolutionary Wars he saw extensive fighting and rose to the rank of Field Marshal.