Wilhelm of the Palatinate-Zweibrücken

The children were unable to succeed to their father's Duchy due to the morganatic nature of their parents' marriage at first, but were allowed to wear the name Freiherr von Zweibrücken in 1792.

[5] Due to a former business agreement of Louis XV of France and his father from March 1751, who promised to the French king to raise a German battalion of infantry for France when and if needed,[6] the Infantry Regiment "Royal Deux-Ponts" (raised on 19, 1757) of two battalions to the French crown after the outbreak of the Seven Years' War, when it was at first deployed in the Battle of Rossbach.

The couple had four children, named Christian (1782–1859, a later general), Karl (1784-1812), Maria Anna, Gräfin von Forbach (1785-1857) and Henriette.

[7] As part of De Rochambeau's expedition corps the "Royal Deux-Ponts" during the American Revolutionary War, where the regiment served in the siege of Yorktown, also called the "German Battle", on October 4, 1781.

[4] After the French Revolution, he served as a general in the Bavarian army, and died in Munich, where he and his brother Christian are buried in the Old Southern Cemetery.