Prosper Louis, 7th Duke of Arenberg

He was granted new lands by Joséphine's husband Napoleon Bonaparte (expanding his holdings from 413 km2 to 3,388 km2) and gained the additional titles of Duke of Meppen and Prince of Recklinghausen.

He lost his sovereignty over his lands in 1810 when Arenberg was mediatised into France but retain the style of HSH (His Serene Highness), which is still used by his descendant.

[1][2] Arenberg was colonel of the Belgian Chevau-Légers d'Arenberg which fought in the Peninsular War, during which he was wounded and captured by the British at the Battle of Arroyo dos Molinos on 28 October 1811.

[5] Arenberg took no part in the 1815 Waterloo Campaign other than to attend the Duchess of Richmond's ball, but his contacts among the British did not save his lands which were lost when they were overrun by the Prussians and the Hanoverians.

[1] A younger son, Charles, was the second husband of the former Princess of Serbia Júlia Hunyady de Kéthely.