Frédéric Auguste Alexandre de Beaufort-Spontin, 1st Duke of Beaufort-Spontin

Frédéric Auguste Alexandre de Beaufort-Spontin, 1st Duke of Beaufort-Spontin (14 September 1751 – April 1817), was a member of the House of Beaufort-Spontin, a Belgian noble family that opposed Napoleon I of France. Joseph II, Holy Roman Emperor awarded him the title 1st Duke of Beaufort-Spontin on 2 December 1782.

First marriage
On 5 January 1783, in Paris, he married Maria Leopoldina Álvarez de Toledo, daughter of Pedro de Alcántara Álvarez de Toledo y Silva Mendoza, 12th Duke of the Infantado.

Issue

 * 1) Marie Françoise de Beaufort-Spontin (3 July 1785 - 28 January 1830) married Francisco de Borja Téllez-Girón y Pimentel, 10th Duke of Osuna and had issue.
 * 2) Françoise Philippine (1785-1830),
 * 3) Mariana Marie Emanuelle Josèphe (1786-1824)
 * 4) Teresa (1789-1857

Second marriage
On 1 October 1807, he married Countess Ernestine Margarete of Starhemberg.

Issue

 * 1) Frédéric Louis, 2nd Duke of Beaufort-Spontin (1809-1834)
 * 2) Valérie de Beaufort-Spontin (1811-1887)
 * 3) Marie Hermengilde de Beaufort-Spontin (1813-1880)
 * 4) Carl Alfred August Konstantin de Beaufort-Spontin (1816-1888)