|Title of host publication||Oxford Dictionary of National Biography|
|Publisher||Oxford University Press|
|Publication status||Published - 2004|
Hay, John, first marquess of Tweeddale (1626–1697), politician, was the eldest son of John Hay, eighth Lord Hay of Yester and first earl of Tweeddale (c.1593–1654), and his first wife, Lady Jean Seton (d. 1626/7), daughter of Alexander Seton, first earl of Dunfermline (1556–1622).
- John Hay
- first marquess of Tweeddale