Question: What is the surname of the title in the Peerage of Scotland that is the oldest existing marquessate in Scotland ?

text: List of marquessates in the peerages of Britain and Ireland
Marquessates in the Peerage of Scotland , 1488–1707

This page lists all marquessates, extant, extinct, dormant, abeyant, or forfeit, in the peerages of England, Scotland, Great Britain, Ireland, and the United Kingdom. The title of Marquess of Dublin, which is perhaps best described as Anglo-Irish, was the first to be created, in 1385, but like the next few creations, the title was soon forfeit. The title of Marquess of Pembroke, created in 1532 by Henry VIII for Anne Boleyn, has the distinction of being the first English hereditary peerage granted to a woman in her own right (styled Marchioness in the patent). The English title Marquess of Winchester, created in 1551, is the earliest still extant, so is Premier Marquess of England. The title long remained less common, and on the evening of the Coronation of Queen Victoria in 1838, the Prime Minister Lord Melbourne explained to her (from her journals):
Title Date of creation Surname Current status Notes
Marquess of Ormonde 28 January 1488 Stewart Extinct 17 January 1504 Subsidiary title of the Duke of Ross
Marquess of Fife 12 May 1567 Hepburn Forfeit 29 December 1567 Subsidiary title of the Duke of Orkney
Marquess of Hamilton 17 April 1599 Hamilton Extinct 12 September 1651 Created Duke of Hamilton in 1643
Marquess of Huntly 17 April 1599 Gordon Extant Created Duke of Gordon in 1684 , which title became extinct in 1836
Marquess of Ormonde 23 December 1600 Stewart Merged in crown 27 March 1625 Subsidiary title of the Duke of Albany ; created Duke of York in England in 1605 ; also Prince of Wales , Duke of Cornwall , and Duke of Rothesay from 1612
Marquess of Wigtown 1602 Stewart Extinct 1602 Subsidiary title of the Duke of Kintyre and Lorne
Marquess of Douglas 14 June 1633 Douglas Extant Created Duke of Douglas in 1703 , which title became extinct in 1761 ; also Duke of Hamilton and Duke of Brandon from 1761
Marquess of Argyll 15 November 1641 Campbell Forfeit 27 May 1661
Marquess of Clydesdale 12 April 1643 Hamilton Extant Subsidiary title of the Duke of Hamilton
Marquess of Montrose 6 May 1644 Graham Extant Created Duke of Montrose in 1707
Marquess of March 1 May 1672 Maitland Extinct 24 August 1682 Subsidiary title of the Duke of Lauderdale
Marquess of Atholl 17 February 1676 Murray Extant Created Duke of Atholl in 1703
Marquess of Bambreich 29 May 1680 Leslie Extinct 27 July 1681 Subsidiary title of the Duke of Rothes
Marquess of Queensberry 11 February 1682 Douglas Extant Created Duke of Queensberry in 1684 . The titles were separated from 1711-1715 and again after 1810
Marquess of Dumfriesshire 3 November 1684 Douglas Extant Subsidiary title of the Duke of Queensberry ; also Marquess of Queensberry 1684-1711 and 1715-1810 ; also Duke of Buccleuch from 1810
Marquess of Tweeddale 17 December 1694 Hay Extant
Marquess of Kintyre and Lorne 23 June 1701 Campbell Extant Subsidiary title of the Duke of Argyll ; created Duke of Greenwich in Great Britain 1719-1743 ; created Duke of Argyll in the United Kingdom in 1892
Marquess of Lothian 2 3 June 1701 Kerr Extant
Marquess of Annandale 24 June 1701 Johnston/Johnstone/Vanden Bempde Dormant 29 April 1792
Marquess of Angus and Abernethy 10 April 1703 Douglas Extinct 1761 Subsidiary title of the Duke of Douglas