He was a son of William Hay, 5th Lord Hay of Yester and Margaret Ker eldest daughter of Sir John Ker of Ferniehirst.
His homes were Yester Castle and nearby Bothans, replaced by Yester House, in East Lothian, and Neidpath Castle in the Scottish Borders.
His will was dated at the Place of Bothans, 24 January 1609.
[1] He married Margaret Ker, a daughter of Mark Kerr, 1st Earl of Lothian.
Their children included:[2] In 1644 his widow Margaret Ker founded Lady Yester's Kirk in Edinburgh.