Duke of Urach
Wilhelm, 1st Duke of Urach, was the son of Duke Wilhelm of Württemberg (1761-1830) and his morganatic wife, Baroness (Freiin) Wilhelmine von Tunderfeldt-Rhodis (1777-1822), whom he married at Coswig on 23 August 1800. His paternal grandfather was Duke Friedrich II Eugen (1732-1797), from whom all claimants to the Kingdom of Württemberg are descended. Because of his first marriage to Théodolinde de Beauharnais, the first Duke had converted to Roman Catholicism.