William II (1307 – 26 September 1345) was Count of Hainaut from 1337 until his death. He was also Count of Holland (as William IV) and Count of Zeeland. He succeeded his father, Count William I of Hainaut. While away fighting in Prussia, the Frisians revolted. William returned home and at the Battle of Warns, he was killed.
|Died||26 September 1345|
Warns, near Stavoren
|Noble family||House of Avesnes|
|Spouse(s)||Joanna, Duchess of Brabant|
|Father||William I, Count of Hainaut|
|Mother||Joan of Valois|
William was born in 1307, the son of William I of Hainaut and Joan of Valois. In 1334, he married Joanna, Duchess of Brabant, the daughter and heiress of John III, Duke of Brabant, but had no issue. He fought in France as an ally of the English (He was the brother-in-law of King Edward III of England.) He besieged Utrecht, because his one-time favorite bishop, John van Arkel of Utrecht, had turned against him. In 1339, William participated in the Siege of Cambrai (1339).
William fought against the Saracens, and went on crusade with the Teutonic Order in Prussia. He was killed near Stavoren, during one of the battles of Warns against the Frisians in 1345.
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