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)
- James Drummond, 1st Lord Maderty
- John Drummond, 2nd Lord Maderty
- David Drummond, 3rd Lord Maderty
title passes to a descendant of the 1st Viscount Strathallan, who becomes 4th Lord Maderty Viscounts Strathallan (1686)
- William Drummond, 1st Viscount Strathallan
- William Drummond, 2nd Viscount Strathallan
- William Drummond, 3rd Viscount Strathallan
- William Drummond, 4th Viscount Strathallan
- James Drummond, de jure 5th Viscount Strathallan, attainted 1746 for his father's support of the Jacobite rebellion
- James Drummond, de jure 6th Viscount Strathallan
- General Andrew John Drummond, de jure 7th Viscount Strathallan
- James Andrew John Laurence Charles Drummond, 8th Viscount Strathallan. By Act of Parliament in 1824, the attainder of 1746 was reversed and James became Viscount.
- William Henry Drummond, 9th Viscount Strathallan
- James Drummond, 10th Viscount Strathallan
- William Huntley Drummond, 11th Viscount Strathallan, succeeded as 15th Earl of Perth in 1902
- James Eric Drummond, 12th Viscount Strathallan, 16th Earl of Perth
- John David Drummond, 13th Viscount Strathallan, 17th Earl of Perth
- John Drummond, 14th Viscount Strathallan, 18th Earl of Perth
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