[14][17] Protestant baptismal records for the Temple in Pau for the period 1668–1681[18] and 1673–1684,[19] however, point to a large family with no fewer than 11 children, of which six sons to carry the name forward.

In October 1685, he published the Edict of Potsdam granting the Huguenots everything the Edict of Fontainebleau refused them: safe passage to Brandenburg, freedom to live and work where they chose, religious freedom and the right to worship in their native French, tax exemptions for 10 years, and more, going as far as granting them the same rights as citizens of the states of Brandenburg-Prussia.

[20] Huguenot Noblemen and officers flocked to the military, where letters patent granted them the same rank they previously held in France, with the youngest among them granted entry ranks as ensigns or lieutenants, while in parallel new roles were created for notaries public, members of the bar and members of parliament, and lastly, businessmen and tradesmen were offered significant opportunities to start new industrial activities.

[20] By October 1686, Jean de Forcade de Biaix began a military career that would span 41 years, raise him to the highest military rank in the Prussian Army, lead him into posts in the civil administration of Prussia, and have him placed by Frederick William I of Prussia at the head of administration and decision-making for all Huguenot colonies in the kingdom from 1718 until his death in 1729.

In 1697, he married the Baroness Juliane von Honstedt[4][6][11] from an old Württembergian family, who also had the advantage of being the daughter of a major general[11] in the service of Prussia.

Each night during the fifteen years of his governorship, he would send a letter to King Frederick William I of Prussia in which he recounted in detail the events of the day, allegedly without ever forgetting a single one.

Following the death of Lieutenant General Count Otto Magnus von Dönhoff on 14 December 1717, who had hitherto been the Prussian minister responsible for all Huguenot colonies in Prussia, Frederick William I, then just five years into his reign, assembled the French in Berlin and gave them the freedom to choose from his ministers the one in whom they had the greatest confidence as his replacement.

To ensure the choice was appropriate, he handed the matter over to the then Commandant of Berlin, Colonel von Forcade, who historians recounting the event described as "…a brave soldier, but scientifically speaking, quite uneducated.

"[26][27] Despite his educational handicap, Colonel von Forcade has been called "one of the most important figures in the reformed emigration,"[28] and he enjoyed the full confidence[28] of King Frederick William I.

'Tis this makes us take the Liberty of most humbly intreating your Majesty, that you will yourself please to name that Person of your Ministers, whom you shall judge most proper to fulfil (sic) your Intentions to us.

[30] On 9 March 1719, the King founded a new quorum named the Grand Directoire aka Conseil françois (sic) in Berlin under the presidency of General von Forcade,[26] [wrong reference] which would have the responsibility of representing the best interests of the Huguenot colonies.

[26][31][32] On 29 February 1720, with General von Forcade at the head of all Huguenot affairs in the kingdom, to the benefit of all Huguenot refugees, Frederick William I renewed the edicts and declarations, privileges, liberties, and advantages enacted by his predecessors, and determined that all Frenchmen who left their fatherland for religious reasons would benefit from the advantages of the Naturalization Edict of 13 May 1709 and other advantages granted earlier, in particular the 15-year exemption from all charges and taxes (with the exception of excise), and decreed that all Huguenots would fall under the jurisdiction of French courts established in the kingdom.

[33] The newly reorganized Huguenot colonies under the Grand Directoire and General von Forcade received these edicts with tremendous gratitude and reassurance, and found effective protection from the King against the often violent levies that government officials from time-to-time attempted to impose.

The Grand Directoire under General von Forcade facilitated construction projects such as the Klosterkirche (1726), the Luisenstadtkirche (1727), and the Hospitalkirche in Berlin, as well as the French reformed churches in Königsberg and Frankfurt an der Oder.

Jean de Forcade de Biaix was married on 15 April 1697[49][50] at the French Cathedral in Berlin, on the order of Frederick III Prince-elector of Brandenburg,[49][50] by Pastor Bancelin, Senior,[50] with the Baroness Juliane von Honstedt,[4][6][11] aka Juliane von Hohnstädt,[5] from the noble house of Erdeborn.

Historical literature published in 1799 about the Huguenot community in Prussia make specific reference to such a marriage, but without precision as to whether it was a daughter or a sister of Friedrich Wilhelm Quirin von Forcade de Biaix.

His grandchildren included two more Knights of the Order of Pour le Mérite, one Knight of the Cross of the Royal Prussian Order of St. John Bailiwick of Brandenburg, and a First Lady-in-Waiting (French: Première Dame d'Honneur) to Her Royal Highness the Queen consort of Prussia, Elisabeth Christine of Brunswick-Wolfenbüttel-Bevern, wife of Frederick the Great.

Historical terms in German used in the production of this article, and their English definitions, include: The appointment to Regimentschef, a Regimental Commander in the Prussian Army, was usually for life.

[14] The property was not a fief in the classical sense, because it was not a large plot of land, with all the buildings on it and the people who lived there as serfs, and as such did not required the collection of taxes, the exercise of punishment, and other related rights and obligations.

[citation needed] Under intimidation from the policy of harassment of religious minorities through the use of dragonnades, started in 1681, to intimidate Huguenots into converting to Catholicism or to leave France, and under the threat of confiscation of properties of nobles who did not convert, both Jean de Forcade, Seigneur de Biaix and his eldest son abjured from Protestantism,[15] therewith maintaining possession of Biaix.