| Duncannon (Viscountcy) |
William Ponsonby - Sun 28th Feb 1723
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- |
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| Duncan of Springbank (Barony) |
Ian James Duncan - Fri 14th Jul 2017
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- |
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| Duncan-Sandys (Barony) |
Duncan Edwin Sandys - Thu 2nd May 1974
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26 November 1987 |
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| of Dundaff (Viscountcy) |
James Graham - Sun 24th Apr 1707
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- |
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| Dundalk (Barony) |
Ehrengard Melusine von der Schulenburg - Thu 16th Jul 1716
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10 May 1743 |
- |
| Dundas (Barony) |
Thomas Dundas - Wed 13th Aug 1794
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- |
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| of Dundee (Earldom) |
John Scrimgeour - Wed 8th Sep 1660
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- |
- |
| of Dundonald (Earldom) |
William Cochrane - Sun 12th May 1669
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- |
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| Dunedin (Barony) |
Andrew Graham Murray - Thu 9th Mar 1905
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21 August 1942 |
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| Dunedin (Viscountcy) |
Andrew Graham Murray - Wed 17th Feb 1926
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21 August 1942 |
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| Dunfermline (Barony) |
James Abercromby - Fri 7th Jun 1839
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2 July 1868 |
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| Dungan (Viscountcy) |
William Dungan - Tue 14th Feb 1662
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| Dungan (Barony) |
William Dungan - Tue 14th Feb 1662
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- |
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| Dungannon (Viscountcy) |
Marcus Trevor - Mon 28th Aug 1662
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8 November 1706 |
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| of Dungannon (Earldom) |
Ehrengard Melusine von der Schulenburg - Thu 16th Jul 1716
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10 May 1743 |
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| of Dungannon (Marquessate) |
Ehrengard Melusine von der Schulenburg - Thu 16th Jul 1716
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10 May 1743 |
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| Dungannon (Viscountcy) |
Arthur Hill-Trevor - Mon 17th Feb 1766
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11 August 1862 |
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| Dungarvan (Viscountcy) |
Richard Boyle - Fri 16th Oct 1620
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| Dunglas (Lordship) |
Alexander Home - Fri 4th Mar 1605
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| Dunira (Barony) |
Henry Dundas - Fri 24th Dec 1802
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