Jean de Forcade de Biaix, aka Jean de Forcade, Marquis de Biaix, aka Jean-Quirin de Forcade de Biaix, aka Jean Quérin von Forcade, Herr von Biaix, aka Johann Querin de Forcade, Herr zu Biaix, aka Johann Quirin von Forkade de Biaix, 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.

Béarn is one of the traditional provinces of France, located in the Pyrenees mountains and in the plain at their feet, in Southwestern France. Along with the three Basque provinces of Soule, Lower Navarre and Labourd, the Principality of Bidache, as well as small parts of Gascony, it forms the current Pyrénées-Atlantiques department. The capitals of Béarn were successively Beneharnum, Morlaàs, Orthez and then Pau.