Upon the death of Prosper Ferdinand, Count Fürstenberg, in the War of the Spanish Succession, in 1704 the Fürstenberg inheritance was divided between the count's two youngest sons, Joseph Wilhelm Ernst and Wilhelm Egon; the eldest son was an ecclesiastic.
The family of Fürstenberg was raised to princely status 2 February 1716, with the elevation of Joseph Wilhelm Ernst, as the first Prince (Fürst) of Fürstenberg (German: Fürst zu Fürstenberg).
The first prince had three sons, Joseph Wenzel Johann Nepomuk (1728–1783), Karl Borromäus Egon (1729–1787), and Prosper Maria, who died in infancy.
The title passed through the line of the first son, Joseph Wenzel Johann Nepomuk (as second prince), to his son Joseph Maria Benedikt Karl (third prince, who died in 1796) and then to another son of the second prince, Karl Joachim Aloys (fourth prince).
The last son of Joseph Wilhelm Ernst died in 1803 without male issue.
Consequently, the title passed to the male line of first prince's  second son.
This son, Karl Borromäus Egon, had died in 1787.

Karl Borromäus Egon's oldest son, Joseph Maria Wenzel (16 August 1754 – 14 July 1759), died as a small child.
The second son, Philipp Nerius Maria (Prague, 21 October 1755 – 5 June 1790), married in 1779 to his first cousin, Josepha Johanna Benedikta von Fürstenberg (sister of the third and fourth princes), at Donaueschingen.
Only one of their sons survived childhood, but died at the age of 15 years.
The other children of this second son were all daughters, and thus not eligible to inherit the title Prince of Fürstenberg.
Consequently, the title devolved to the agnatic male descendants of Karl Aloys zu Fürstenberg.

In 1803, two of Karl Aloys zu Fürstenberg's children were still living.
Karl Egon, as the surviving son, inherited the title Prince of Fürstenberg; he and his eldest sister lived into adulthood and produced families.

Children of Karl Aloys zu Fürstenberg and Elizabeth, Princess of Thurn und Taxis, were:
Marie Leopoldine (Prague, 4 September 1791 – Kupferzell, 10 January 1844); married at Heiligenberg, 20 May 1813 to Charles Albert III, Prince of Hohenlohe-Waldenburg-Schillingsfürst (Vienna, 29 February 1776 – Bad Mergentheim, 15 June 1843)
Maria Josepha (9 September 1792)
Antonie (28 October 1794 – 1 October 1799)
Karl Egon II (Prague, 28 October 1796 – Bad Ischl 22 October 1854), succeeded his cousin, Joachim, as the fifth Fürst zu Fürstenberg on 17 May 1804.
He married on 19 April 1818, to Amalie Christine Karoline, of Baden (Karlsruhe, 26 January 1795 – Karlsruhe, 14 September 1869).

Maria Anna, 17 September 1798 – 18 July 1799
Upon the death of Prosper Ferdinand, Count Fürstenberg, in the War of the Spanish Succession, in 1704 the Fürstenberg inheritance was divided between the count's two youngest sons, Joseph Wilhelm Ernst and Wilhelm Egon; the eldest son was an ecclesiastic. The family of Fürstenberg was raised to princely status 2 February 1716, with the elevation of Joseph Wilhelm Ernst, as the first Prince (Fürst) of Fürstenberg (German: Fürst zu Fürstenberg). The first prince had three sons, Joseph Wenzel Johann Nepomuk (1728–1783), Karl Borromäus Egon (1729–1787), and Prosper Maria, who died in infancy. The title passed through the line of the first son, Joseph Wenzel Johann Nepomuk (as second prince), to his son Joseph Maria Benedikt Karl (third prince, who died in 1796) and then to another son of the second prince, Karl Joachim Aloys (fourth prince). The last son of Joseph Wilhelm Ernst died in 1803 without male issue. Consequently, the title passed to the male line of first prince's  second son. This son, Karl Borromäus Egon, had died in 1787.
Karl Borromäus Egon's oldest son, Joseph Maria Wenzel (16 August 1754 – 14 July 1759), died as a small child. The second son, Philipp Nerius Maria (Prague, 21 October 1755 – 5 June 1790), married in 1779 to his first cousin, Josepha Johanna Benedikta von Fürstenberg (sister of the third and fourth princes), at Donaueschingen. Only one of their sons survived childhood, but died at the age of 15 years. The other children of this second son were all daughters, and thus not eligible to inherit the title Prince of Fürstenberg. Consequently, the title devolved to the agnatic male descendants of Karl Aloys zu Fürstenberg.
In 1803, two of Karl Aloys zu Fürstenberg's children were still living. Karl Egon, as the surviving son, inherited the title Prince of Fürstenberg; he and his eldest sister lived into adulthood and produced families.
Children of Karl Aloys zu Fürstenberg and Elizabeth, Princess of Thurn und Taxis, were:
Marie Leopoldine (Prague, 4 September 1791 – Kupferzell, 10 January 1844); married at Heiligenberg, 20 May 1813 to Charles Albert III, Prince of Hohenlohe-Waldenburg-Schillingsfürst (Vienna, 29 February 1776 – Bad Mergentheim, 15 June 1843)
Maria Josepha (9 September 1792)
Antonie (28 October 1794 – 1 October 1799)
Karl Egon II (Prague, 28 October 1796 – Bad Ischl 22 October 1854), succeeded his cousin, Joachim, as the fifth Fürst zu Fürstenberg on 17 May 1804. He married on 19 April 1818, to Amalie Christine Karoline, of Baden (Karlsruhe, 26 January 1795 – Karlsruhe, 14 September 1869).
Maria Anna, 17 September 1798 – 18 July 1799
Karl Aloys zu Fürstenberg