William Alnwick was an English Catholic clergyman. He was Bishop of Norwich

Bishop of Norwich

The Bishop of Norwich is the Ordinary of the Church of England Diocese of Norwich in the Province of Canterbury.The diocese covers most of the County of Norfolk and part of Suffolk. The see is in the City of Norwich where the seat is located at the Cathedral Church of the Holy and Undivided...

 (1426–1436) and Bishop of Lincoln

Bishop of Lincoln

The Bishop of Lincoln is the Ordinary of the Church of England Diocese of Lincoln in the Province of Canterbury.The present diocese covers the county of Lincolnshire and the unitary authority areas of North Lincolnshire and North East Lincolnshire. The Bishop's seat is located in the Cathedral...

 (1436–1450).

Educated at Cambridge, Alnwick was Archdeacon of Salisbury before being named Keeper of the Privy Seal

Lord Privy Seal

The Lord Privy Seal is the fifth of the Great Officers of State in the United Kingdom, ranking beneath the Lord President of the Council and above the Lord Great Chamberlain. The office is one of the traditional sinecure offices of state...

 on 19 December 1422. He had custody of the seal until 24 February 1432.

Alnwick was nominated to the see of Norwich on 27 February 1426 and consecrated on 18 August 1426. He was translated to the see of Lincoln on 19 September 1436.

While bishop Alnwick built the east wing of bishop's palace at Lincoln

Lincoln, Lincolnshire

Lincoln is a cathedral city and county town of Lincolnshire, England.The non-metropolitan district of Lincoln has a population of 85,595; the 2001 census gave the entire area of Lincoln a population of 120,779....

, with chapel and dining-parlour and a gateway tower.

Alnwick died while Bishop of Lincoln on 5 December 1449.