William Hay, 3rd Earl of Erroll

The Right Honourable The Earl of Erroll PC
Arms of the Earl of Erroll
7th Lord High Constable of Scotland
In office 1470–1507
Preceded by	Nicholas Hay
Succeeded by	William Hay
Personal details
Born	c. 1449 Errol, Perthshire, Scotland
Died	14 January 1507 (age 70 or 71) Huntly, Aberdeenshire
Spouse(s)	Isabel Gordon Elizabeth Leslie

William Hay, 3rd Earl of Erroll PC (c. 1449 – 14 January 1507) was a Scottish peer. He was the third Earl of Erroll and the fourth Lord Hay of Erroll.

William Hay was the son of William Hay, 1st Earl of Erroll and his wife, Beatrix, daughter of James Douglas, 7th Earl of Douglas. He was the great-great grandson of King Robert II of Scotland and his first wife, Elizabeth Mure.

He inherited the earldom after the death of his older brother, Nicholas, in 1470.

He was a member of the King James III's Privy Council and a commissioner for the 1482 peace treaty with England.

He married first Lady Isabel Gordon, daughter of George Gordon, 2nd Earl of Huntly and Princess Annabella of Scotland, daughter of King James I of Scotland. They had three sons and one daughter:

He married secondly Lady Elizabeth Leslie, daughter of George Leslie, 1st Earl of Rothes. They had two sons and one daughter: