Duke William was born at Carlsruhe, Kingdom of Prussia (now Pokój, Poland) was the first child of Duke Eugen of Württemberg (1788–1857), (son of Duke Eugen of Württemberg, and Princess Louise of Stolberg-Gedern) by his second marriage to Princess Helene of Hohenlohe-Langenburg (1807–1880), (daughter of Charles Louis, Prince of Hohenlohe-Langenburg and Countess Amalie of Solms-Baruth).
Opole | Greater Poland Voivodeship | Czersk, Masovian Voivodeship | Podlaskie Voivodeship | West Pomeranian Voivodeship | Pomeranian Voivodeship | Opole Voivodeship | Lower Silesian Voivodeship | Łódź Voivodeship | Kuyavian-Pomeranian Voivodeship | Henryków, Lower Silesian Voivodeship | Srebrna Góra, Lower Silesian Voivodeship | Wojnowo, Lubusz Voivodeship | Silesian Voivodeship | Sandomierz Voivodeship | Nowogródek Voivodeship | Masovian Voivodeship | Białystok Voivodeship | Warmian-Masurian Voivodeship | voivodeship | Poznań Voivodeship (14th century–1793) | Poznań Voivodeship | Lesser Poland Voivodeship | Gródek, Świętokrzyskie Voivodeship | Gawrony, Lower Silesian Voivodeship | Gawronki, Lower Silesian Voivodeship | Dobromierz, Lower Silesian Voivodeship | Bytków, Lower Silesian Voivodeship | Włóki, Masovian Voivodeship | Warblewo, Pomeranian Voivodeship |
At the 2007 Parliamentary elections the candidate list to the Sejm (Polish parliament) got 8.81% of the votes in Opole Voivodeship, and only one seat in the Sejm, Ryszard Galla (8,193 votes).
The union was established in 1946, with the first sport club LZS Czarnowąsy in Opole Voivodeship.
Pokój's coat of arms shows the Württemberg three black antlers on the right, and the Upper Silesian eagle of the Dukes of Opole on the left side.
He managed to get into a Soviet Yak-9 plane, which was standing on the tarmac at a military airport in Izbicko (Opole Voivodeship).