Juan Del Águila (d'Aguila) y Arellano was a Spanish general. He commanded the Spanish expeditionary Tercio troops in Sicily then in Brittany, before serving as general of the Spanish armies in the invasion of Ireland (1600–1602). As a soldier, and subsequently Maestre de campo of the Tercios, he was posted to Sicily, Africa, Malta, Corsica, Milan, the Netherlands, Spain, Portugal, France and Ireland, where he participated in major military events of his time, such as the Siege of Malta, the Looting of Antwerp, the Siege of Antwerp, the "Miracle of Empel", an expedition in support of the French Catholics during the French Wars of Religion, the Raid on Mount's Bay and another one in support of Irish clans during the Nine Years War.

The sack of Antwerp, often known as the Spanish Fury at Antwerp, was an episode of the Eighty Years' War. It is the greatest massacre in the history of the Low Countries.