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.