Duchy
The seigneurie of Roquelaure was elevated to a duchy in 1652 in favor of Gaston-Jean-Baptiste de Roquelaure (1617-1683), son of Antoine de Roquelaure.
After this line died out, a different marquisate of Roquelaure was created in 1766 for their relatives, the lords of Saint-Aubin, today Roquelaure-Saint-Aubin.
Read more about this topic: Roquelaure