"Adolf, Duke of Jülich-Berg (c. 1370 – 14 July 1437), was the first Duke of the combined duchies of Jülich and Berg. He was the son of William VII of Jülich, 1st Duke of Berg and Anna of the Palatinate.
In 1397, Adolf rebelled against his father along with his brother William, ravaged Düsseldorf and imprisoned his father. He was outlawed and was subsequently subdued in 1405. Upon his father´s death in 1408, Adolf became the 2nd Duke of Berg. Adolf fought against Lorraine and other pretenders for Bar but surrendered after his capture in 1417. His father´s cousin, Reginald, Duke of Jülich and Guelders, had no heirs and upon his death in 1423, Adolf succeeded him in three-fourths of the Duchy, the fourth quarter (called Jülicher Quart) was inherited by John II of Loon, Lord of Heinsberg and Löwenberg, grandson of the first duke of Jülich, William V. The dukedom of Jülich passed to Adolf, thus becoming the first duke of the combined duchies of Jülich and Berg. John II. of Loon-Heinsberg was than also called Lord of Jülich. Adolf also began a year-long hereditary war against the House of Egmond for the dukedom of Guelders but could not win even with financial support from Sigismund, Holy Roman Emperor, who supported Adolf in this fight despite Adolf´s opposition to Sigismund´s coronation at Aachen in 1414. Adolf supported the Roman candidate in the Council of Constance which ended the Western Schism. He traditionally fought against the Archbishop of Cologne. He later secured Monschau-Montjoie and in 1428 he seized Lievandal-Wevelinghoven." - (en.wikipedia.org 16.10.2020)
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