Jean de Forcade de Biaix

Jean de Forcade de Biaix, a.k.a. Jean de Forcade, Marquis de Biaix, a.k.a. Jean-Quirin de Forcade de Biaix, a.k.a. Jean Quérin von Forcade, Herr von Biaix, a.k.a. Johann Querin de Forcade, Herr zu Biaix, a.k.a. Johann Quirin von Forkade de Biaix ((1663-12-14)14 December 1663 – (1729-02-02)2 February 1729), was a Huguenot, a descendant of the noble family of Forcade and Lieutenant General in the service of the Kingdom of Prussia. He was the Regimentschef of the 23rd Prussian Infantry Regiment, Commandant of the Royal Residence in Berlin, Gouverneur militaire of Berlin, a Knight of the Order of the Black Eagle a member of King Frederick I of Prussia's "Tobacco Collegium". and president of the Grand Directoire 1718–1729, the deliberative and decision-making body responsible for all Huguenot affairs in the kingdom.

Although there are references to Jean de Forcade de Biaix as the "Marquis de Biaix" in some Prussian sources published between 1788 and 1837, there is no evidence that he was ever a Marquis. The noble manor of Biaix in the city of Pau was never a marquisate, at any time in its history.

He was also never the Seigneur de Biaix, as stated in some historical Prussian sources. The title Seigneur was not hereditary. In the case of his family, his father, who purchased Biaix manor in 1659, was the Seigneur de Biaix. Following the father's death in 1684, the property and the right to enter the Order of Nobility of the Estates of Béarn were passed to the eldest son, Jean's elder brother, Isaac de Forcade de Biaix (Seigneur de Biaix 1684–1737).