Lord Lothian

The current Chief of the Kerrs in Scotland is Michael Andrew Foster Jude Kerr, 13th Marquis of Lothian, Baron Kerr of Monteviot, PC, QC, MP.  He is commonly known as Michael Ancrum.

A Marquis ranks above an Earl, but below a Duke.  The title of Marquis was typically given to those who lived on the Borders of Scotland.
Lord Lothian at the 2019 Central Florida Scottish Highland Games. Courtesy of Anonymous More.