Who married Juliane of Nassau-Dillenburg (1587-1643)?

Countess Juliane of Nassau-Siegen (3 September 1587 – 15 February 1643), German: Juliana Gräfin von Nassau-Siegen, official titles: Gräfin zu Nassau, Katzenelnbogen, Vianden und Diez, Frau zu Beilstein, was a countess from the House of Nassau-Siegen, a cadet branch of the Ottonian Line of the House of Nassau, and through marriage landgravine of Hesse-Kassel.

Maurice of Hesse-Kassel (German: Moritz; 25 May 1572 – 15 March 1632), also called Maurice the Learned or Moritz, was the Landgrave of Hesse-Kassel (or Hesse-Cassel) in the Holy Roman Empire from 1592 to 1627.