Henry de Percy, 1st Baron Percy

Henry de Percy, 1st Baron Percy of Alnwick (1273–1314), was an English magnate who fought for Edward I in Wales and Scotland, earning large Scottish grants that Robert Bruce later reconquered. He acquired Alnwick Castle, making the Percys a dynasty of northern warlords. He married Eleanor FitzAlan, daughter of the Earl of Arundel, and had two sons, Henry and William.

Under Edward II he joined the barons against the king's favourite Piers Gaveston and was imprisoned. He then refused to serve at Bannockburn in 1314, remaining at Alnwick, where he died that October, leaving Henry to succeed him as 2nd baron.