Viscount Strathallan

The title of Lord Maderty was created in 1609 for James Drummond, a younger son of the 2nd Lord Drummond of Cargill. The titles of Viscount Strathallan and Lord Drummond of Cromlix were created in 1686 for William Drummond, a younger son of the 2nd Lord Madderty. Both creations were in the Peerage of Scotland, and are now held by the Earl of Perth.

Lords Maderty (1609)
title passes to a descendant of the 1st Viscount Strathallan, who becomes 4th Lord Maderty (below)
 * James Drummond, 1st Lord Maderty (d. July 1623)
 * John Drummond, 2nd Lord Maderty (d. 1647)
 * David Drummond, 3rd Lord Maderty (d. 20 January 1692)

Viscounts Strathallan (1686)

 * William Drummond, 1st Viscount Strathallan (1617 – 23 March 1688)
 * William Drummond, 2nd Viscount Strathallan (8 August 1670 – 7 July 1702)
 * William Drummond, 3rd Viscount Strathallan (1694 – 26 May 1711)
 * William Drummond, 4th Viscount Strathallan (d. Culloden 16 April 1746)
 * James Drummond, de jure 5th Viscount Strathallan (1722 – 22 June 1765), attainted 1746 for his father's support of the Jacobite rebellion
 * James Drummond, de jure 6th Viscount Strathallan (c. 1752 – 10 December 1775)
 * General Andrew John Drummond, de jure 7th Viscount Strathallan (1758 – 20 January 1814)
 * James Andrew John Laurence Charles Drummond, 8th Viscount Strathallan (24 March 1767 – 14 May 1851). By Act of Parliament in 1824, the attainder of 1746 was reversed and James became Viscount.
 * William Henry Drummond, 9th Viscount Strathallan (5 March 1810 – 23 January 1886)
 * James Drummond, 10th Viscount Strathallan (1839–1893)
 * William Huntley Drummond, 11th Viscount Strathallan (1871–1937), succeeded as 15th Earl of Perth in 1902
 * James Eric Drummond, 12th Viscount Strathallan, 16th Earl of Perth (1876–1951)
 * John David Drummond, 13th Viscount Strathallan, 17th Earl of Perth (1907–2002)
 * John Drummond, 14th Viscount Strathallan, 18th Earl of Perth (1935–2023)
 * (See Earl of Perth for further succession)