The title of Earl of Northumberland has been created several times in the Peerage of England and of Great Britain, succeeding the title Earl of Northumbria. Its most famous holders are the House of Percy, who were the most powerful noble family in Northern England for much of the Middle Ages. The heirs of the Percys, via a female line, were ultimately made Duke of Northumberland in 1766, and continue to hold the earldom as a subsidiary title.
17th-century Percy Window in Petworth House, Sussex, displaying in stained glass 9 heraldic escutcheons of quartered arms of 1st, 3rd, 4th, 5th, 6th, father of 7th & 8th, 7th, 8th & 9th Percy Earls of Northumberland, each impaling the quartered arms of his wife.
The Percy family is an English noble family. They were among the most powerful noble families in Northern England for much of the Middle Ages. The noble family is known for its long rivalry with the House of Neville, another family powerful in northern England during the 15th century. The Percy-Neville feud led to the Wars of the Roses, at the time known as the Civil Wars, in England.
17th-century Percy Window in Petworth House, Sussex, displaying in stained glass 9 heraldic escutcheons of quartered arms of 1st, 3rd, 4th, 5th, 6th, father of 7th & 8th, 7th, 8th & 9th Percy Earls of Northumberland, each impaling the quartered arms of his wife.
A portrait of Hugh Percy, 1st Duke of Northumberland
Arms of Smithson of Stanwick, Yorkshire (ancient): Argent, a chevron engrailed sable between three oak leaves erect slipped vert
Augmented arms of Smithson Baronets of Stanwick to Sir Hugh Smithson, 1st Baronet by King Charles II of England for loyalty: Or, on a chief embattled azure three suns proper
