Wilhelm IV, Landgrave of Hesse, 1532-1592 (Personal Name)

Der Ökonomische Staat Landgraf Wilhelms IV, 1977 (subj.) t.p. (Landgraf Wilhelm IV) p. 46 (Wilhelm L. zu Hessen [signature])

GFR 78-A

Brock. Enz. (Wilhelm IV, der Weise, Landgraf (1567-92) Hessen-Kassel, 1532-1592)

Allg. Dt. Biog. (Wilhelm IV, Landgraf von Hessen, 1532-1592)

Brahe, T. Tychonis Brahe Dani Epistolarum astronomicarum libri, 1601: t.p. (... illustriss. et laudatiss. principis Gulielmi Hassiae Landtgravij) p. 3 (Wilhelm von Gottes Gnaden Landtgraue zu Hessen, Graue zu Catzenelnbogen, Dietz, Zigenhayn vnd Nidda) p. 4 (Wilhelmus Dei gratia Landtgravius Hassiae ...)

BnF, catalogue général, viewed October 25, 2021 (Guillaume IV, landgrave de Hesse-Cassel ; born 24 June 1532, died 25 August 1592 ; landgrave of Hesse (1567-1592), first of the Cassel line ; was interested in mathematics and astronomy ; variants: Guillaume de Hesse-Cassel, Guillaume de Hessen, Wilhelm von Hessen-Kassel) http://ark.bnf.fr/ark:/12148/cb10686960n

English Wikipedia, viewed October 25, 2021 (William IV, Landgrave of Hesse-Kassel ; born in Kassel ; After his father's death in 1567, the Landgraviate of Hesse was divided between the four sons out of the late Landgrave of Hesse's first marriage, and William received the portion around the capital Kassel, the Landgraviate of Hesse-Kassel ; took a leading part in safeguarding the Lutheran Reformation) https://en.wikipedia.org/wiki/William_IV,_Landgrave_of_Hesse-Kassel