| Portman (Viscountcy) |
Edward Berkeley Portman - Fri 28th Mar 1873
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| Powerscourt (Viscountcy) |
Richard Wingfield - Tue 19th Feb 1619
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9 September 1634 |
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| Powerscourt (Viscountcy) |
Folliott Wingfield - Mon 22nd Feb 1666
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| Powerscourt (Viscountcy) |
Richard Wingfield - Tue 4th Feb 1744
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| Preston (Viscountcy) |
Peter Ludlow - Fri 3rd Oct 1760
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16 April 1842 |
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| Prestwood (Viscountcy) |
Clement Richard Attlee - Fri 16th Dec 1955
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| Pulteney (Viscountcy) |
William Pulteney - Sat 14th Jul 1742
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7 July 1764 |
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| Purbeck (Viscountcy) |
John Villiers - Wed 19th Jun 1619
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18 February 1658 |
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| Quarendon (Viscountcy) |
Edward Henry Lee - Tue 5th Jun 1674
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3 November 1776 |
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| Quenington (Viscountcy) |
Michael Edward Hicks-Beach - Mon 22nd Feb 1915
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| Radcliffe (Viscountcy) |
Cyril John Radcliffe - Wed 11th Jul 1962
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1 April 1977 |
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| Radclyffe (Viscountcy) |
Francis Radclyffe - Sun 7th Mar 1688
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24 February 1716 |
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| Raincliffe (Viscountcy) |
William Henry Forester Denison - Fri 1st Jul 1887
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17 April 1937 |
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| Ranelagh (Viscountcy) |
Roger Jones - Fri 25th Aug 1628
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13 November 1885 |
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| Ratendone (Viscountcy) |
Freeman Freeman-Thomas - Fri 20th Feb 1931
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19 March 1979 |
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| Raymond (Viscountcy) |
Charles Henry O'Neill - Thu 28th Aug 1800
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25 March 1841 |
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| Reading (Viscountcy) |
Rufus Daniel Isaacs - Mon 26th Jun 1916
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| of Reidhaven (Viscountcy) |
James Ogilvy - Fri 24th Jun 1701
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| Rhondda (Viscountcy) |
David Alfred Thomas - Wed 19th Jun 1918
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20 July 1958 |
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| Rialton (Viscountcy) |
Sidney Godolphin - Sun 26th Dec 1706
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17 January 1766 |
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