Earls, Marquises and Dukes in the Baronage of Scotland
An Earl/Marquis/Duke in the Baronage of Scotland is an ancient title of nobility that is held en baroneum, which means that its holder, who is a earl/marquis/duke in the Baronage of Scotland, is also always a baron. The holder may or may not be a Lord of Regality, which meant that the holder was appointed by the Crown and had the power of "pit and gallows", meaning the power to authorise the death sentence.
Source: Wikipedia — Earls, Marquises and Dukes in the Baronage of Scotland (CC BY-SA 4.0)