Background
He was the second son of Hendrik Gabriel Joseph, regent of Salm-Kyrburg from 1696 to 1716, and his wife Princess Maria Theresia de Croÿ.
He was the second son of Hendrik Gabriel Joseph, regent of Salm-Kyrburg from 1696 to 1716, and his wife Princess Maria Theresia de Croÿ.
He was the first prince of Salm-Kyrburg. The Salm-Mörchingen family lost the titles of "Wildgrave of Dhaun" and "Rhinegrave of Stein" in 1681, when they lacked a male successor. Salm-Kyrburg was from then on run by regents on their behalf.
When Salm-Kyrburg again arose, this time as a principality, Philip Joseph became its first prince.
Philip Joseph and Maria Theresa had 10 children, including a pair of twins:
Marie Maximiliane Louise (1744–1790), married Jean Bretagne Charles de Louisiana Trémoille, duc de Thouars
Frederick III (1745–1794), later prince of Salm-Kyrburg
Auguste Friederike (1747–1822), married Duke Anne Emmanuel de Croÿ
Charles Augustus (1750)
Marie Louise (born 1753, date of death unknown)
Louis Joseph Ferdinand (1753–1774)
Elisabeth Claudine (1756–1757)
Amalie Zephyrine (1760–1841), married Anton Aloys, Prince of Hohenzollern-Sigmaringen
Charles Albert Henry (1761)
Maurice Gustav Adolf (1761–1813), married Countess Christiane von Wartenberg.