Background
William Hay was born in Erroll (now spelled Errol) in Perthshire, the son of Gilbert Hay and Alicia Hay, daughter of William Hay of Yester.
William Hay was born in Erroll (now spelled Errol) in Perthshire, the son of Gilbert Hay and Alicia Hay, daughter of William Hay of Yester.
His was the first Earl of Erroll and the second Lord Hay of Erroll. William Hay inherited the title in 1437 after the death of his father Sir William. In 1454, he purchased lands in Angus from Alexander Ogilvie of Auchterhouse.
On 17 March 1452, King James II of Scotland made him the first Earl of Erroll.
Some historians list his death as August 1460, but Sir James Balfour Paul notes in The Scots Peerage that Kinnoull was alive in the Slains land inventory of November 1461. Balfour writes that the earl likely died in October 1462, and was interred in the Abbey Church of Cupar.