The title of Marquess of Lothian was created in the Peerage of Scotland in 1701 for the 4th Earl of Lothian. The current Marquess of Lothian is the 13th, better known as the Conservative politician Michael Ancram.
Lord Lothian holds the subsidiary titles of Earl of Lothian (created 1606), Earl of Lothian (created again 1631), Earl of Ancram (1633), Viscount of Briene (1701), Lord Newbottle (1591), Lord Jedburgh (1622), Lord Kerr of Nisbet, Lougnewtoun, and Dolphinstoun (1633), Lord Ker of Newbottle, Oxnam, Jedburgh, Dolphinstoun and Nisbet (1701), and Baron Ker, of Kersheugh in the County of Roxburgh (1821), all but the last in the Peerage of Scotland. As Baron Ker in the Peerage of the United Kingdom, previous Marquesses sat in the House of Lords before 1963, when Scottish peers first sat in the House of Lords in their own right.
The earls and dukes of Roxburghe, who are also descended from the Kers of Cessford, have adopted the spelling Ker, while the earls and marquesses of Lothian have taken the form Kerr.
she married William Ker, son of Robert, ist earl of Ancrum (1578-1654), a member of the family of Ker of Ferniehurst, whose father, William Ker, had been killed in 1590 by Robert Ker, afterwards ist earl of Roxburghe.
In 1821 he was created a peer of the United Kingdom as BaronKer and he died on the 27th of April 1824.