John Hay, 2nd Marquess of Tweeddale

John Hay, 2nd Marquess of Tweeddale PC (1645 – 20 April 1713) was a Scottish nobleman.

Early life Hay was the eldest son of John Hay, 1st Marquess of Tweeddale and his wife, Lady Jean Scott, daughter of Walter Scott, 1st Earl of Buccleuch. His younger siblings were Lord David Hay of Belton (who married Rachel Hayes, daughter of Sir James Hayes), Lord Alexander Hay of Spott (who married Catherine Charters, daughter of Laurence Charters), Lady Margaret Hay (wife of Robert Ker, 3rd Earl of Roxburghe), and Lady Jean Hay (wife of William Douglas, 1st Earl of March).

Tweeddale was elected to the court of directors of the Company of Scotland Trading to Africa and the Indies in March 1698. He was one of the principal leaders of the Country Party and used his involvement in the affairs of the Company to pursue his political agenda. On 25 March 1699, he and John Haldane of Gleneagles presented a National Address on behalf of the Company to William III & II in London. He was suspected of being an instigator of the Toubacanti riot in Edinburgh on 20 June 1700.

He was appointed Lord High Commissioner to the Parliament of Scotland in 1704, and was Lord Chancellor of Scotland from 1704 to 1705. He led the Squadrone Volante, but ultimately supported the Union. In October 1706, he was appointed to the Scottish parliamentary committee which scrutinised the Equivalent, the compensation to be paid to Scottish beneficiaries under the Union settlement, the largest group of which were the shareholders and creditors of the Company of Scotland.

He had been elected a Fellow of the Royal Society in 1666 but was expelled in 1685. Lord John Hay (d. 1706), who commanded the famous regiment of dragoons, afterwards called the Scots Greys, at the Battle of Ramillies; he married Lady Elizabeth Dalzell, only child of James Dalzell, 3rd Earl of Carnwath, and, after her death, Elizabeth Orby, a daughter of Sir Thomas Orby, Bt. Lord William Hay (d. 1723) of Newhall, a Brig.-Gen. who married his cousin Margaret Hay, only child of John Hay (eldest son and heir apparent of Sir James Hay, 1st Baronet of Linplum) and Jean Foulis (daughter of Sir John Foulis, 1st Baronet of Ravelstoun). Lady Anne Hay, who married, as his third wife, William Ross, 12th Lord Ross. Lady Jean Hay (d. 1731), who married John Hamilton-Leslie, 9th Earl of Rothes, in 1697.

Lord Tweeddale died on 20 April 1713. He was succeeded in his titles by his eldest son, Charles.