| Macartney (Barony) |
George Macartney - Wed 8th Jun 1796
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| of Macclesfield (Earldom) |
Thomas Parker - Sat 15th Nov 1721
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| of Malmesbury (Marquessate) |
Thomas Wharton - Fri 15th Feb 1715
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20 May 1731 |
- |
| of Malmesbury (Earldom) |
James Harris - Mon 29th Dec 1800
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| Malmesbury (Barony) |
James Harris - Fri 19th Sep 1788
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| of Malton (Earldom) |
Thomas Wentworth - Fri 19th Nov 1734
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| Malton (Barony) |
Thomas Wentworth - Fri 28th May 1728
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| of Manchester (Dukedom) |
Charles Montagu - Fri 28th Apr 1719
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| Mansell (Barony) |
Thomas Mansell - Fri 1st Jan 1712
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| Mansfield (Barony) |
William Murray - Mon 8th Nov 1756
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20 March 1793 |
- |
| of Mansfield (Earldom) |
William Murray - Wed 1st Aug 1792
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| of Mansfield (Earldom) |
William Murray - Thu 31st Oct 1776
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| Masham (Barony) |
Samuel Masham - Fri 1st Jan 1712
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| Maynard (Viscountcy) |
Charles Maynard - Tue 28th Oct 1766
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| Maynard (Barony) |
Charles Maynard - Tue 28th Oct 1766
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| Melcombe (Barony) |
George Dodington - Mon 6th Apr 1761
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| Mendip (Barony) |
Welbore Ellis - Wed 13th Aug 1794
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| Middleton (Barony) |
Thomas Willoughby - Fri 1st Jan 1712
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| Milton (Viscountcy) |
William Fitzwilliam - Tue 6th Sep 1746
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| Milton (Viscountcy) |
Joseph Damer - Fri 18th May 1792
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