Isaac de Forcade de Biaix, aka Isaak de Forcade de Biaix, aka Isaac von Forcade de Biaix, aka Isaac von Forcade, aka Peter Isaac von Forcade, aka Isaak von Forcade (* ca. 1703, Pau, Béarn; † 21 January 1775, Potsdam, Brandenburg, Prussia), was a Royal Prussian colonel, Hofmarschall to the Prince of Prussia and recipient of Prussia's highest military order of merit for heroism, Knight of the Order of Pour le Mérite. He was a descendant of the noble family of Forcade in Béarn, born as a Roman Catholic, but emigrated to Brandenburg-Prussia at a young age, where he joined the Huguenot community in Berlin.