Louise Marie Charlotte Gravin van Ursel (1775-1834) (1775–1834) Parents Princesse et Duchesse Flore d'Arenberg Wolfgang, 3rd Duke d'Ursel Children Gustave de Lannoy Siblings Countess Emilie d'Ursel Charles-Joseph, 4th Duke d'Ursel Partners Jacques-François Adrien Graaf de Lannoy