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John II (born c. 1247β€”died September 11?, 1304, Hainaut) was the count of Hainaut (1280–1304) and of the Dutch provinces of Holland and Zeeland (1299–1304), who united the counties and prevented the northward expansion of the house of Dampierre, the counts of Flanders. Eldest son of John of Avesnes, count of Hainaut, and Alida, sister of Count William II of Holland, John secured the title count of Hainaut in 1280 as John I. Long a...