When Sir Alexander Gibson was made a Lord of Session in 1621, he took the title of Lord Durie.
The Lords of Session set themselves up as the ultimate arbitrators in matters affecting the feudal courts as well.
The first viscount was a Lord of Session in 1629, one of the judges of the Scottish Court of Session, or High Court.
His son Robert, president of the Lords of Session, and grandson, John, were both executed by the Covenanters for their support of Montrose and the royalist cause.
He held the office of a Lord of Session between 1661 and 1664.