Template:Wp-Henry de Percy, 1st Baron Percy

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Henry de Percy, 1st Baron Percy of Alnwick (25 March 1273 – October 1314) was a medieval English magnate.

He fought under King Edward I of England in Wales and Scotland and was granted extensive estates in Scotland, which were later retaken by the Scots under King Robert I of Scotland. He added Alnwick to the family estates in England, founding a dynasty of northern warlords. He rebelled against King Edward II over the issue of Piers Gaveston and was imprisoned for a few months. After his release, he declined to fight under Edward II at the Battle of Bannockburn, remaining at Alnwick, where he died a few months later, aged 41.