Wilhelm (6 July 1785 –2 July 1823 ) Due to mental illness, Wilhelm was duke in name only, with his cousin Peter, Prince-Bishop of Lübeck, acting as regent throughout his entire reign.[4]
^Tikkanen, Amy (30 July 2018). "Federick William III". Encyclopaedia Britannica. Retrieved 21 September 2022.
^ abcdGenealogie ascendante jusqu'au quatrieme degre inclusivement de tous les Rois et Princes de maisons souveraines de l'Europe actuellement vivans [Genealogy up to the fourth degree inclusive of all the Kings and Princes of sovereign houses of Europe currently living] (in French). Bourdeaux: Frederic Guillaume Birnstiel. 1768. p. 38.
^Bogue, David (1852). The Men of the Time in 1852, Or, Sketches of Living Notables. G. Barclay. pp. 287.
^ ab"Oldenburg Royal Family". Monarchies of Europe. Archived from the original on 17 March 2006. Retrieved 1 January 2021.
^"Monarchies of Europe". Archived from the original on 14 June 2007.
^Gerhard Schildt: Von der Restauration zur Reichsgründungszeit, in Horst-Rüdiger Jarck / Gerhard Schildt (eds.), Die Braunschweigische Landesgeschichte. Jahrtausendrückblick einer Region, Braunschweig 2000, pp. 753–766.
^"Biografie Georg I (German)". Meininger Museen. Archived from the original on 15 September 2011. Retrieved 8 September 2014.
^Bille-Hansen, A. C.; Holck, Harald, eds. (1829) [1st pub.:1801]. Kongelig Dansk Hof- og Stats-Calender for Aaret 1829 [Court and State Calendar of the Kingdom of Denmark for the Year 1829] (PDF). Kongelig Dansk Hof- og Statskalender (in Danish). Copenhagen: J.H. Schultz A.-S. Universitetsbogtrykkeri. pp. 5, 8, 51. Retrieved 16 September 2019 – via da:DIS Danmark.
^Birgit Röder; R?der (2003). A Study of the Major Novellas of E.T.A. Hoffmann. Boydell & Brewer. p. 34. ISBN 978-1-57113-271-0.