| Baltinglass (Viscountcy) |
Thomas Roper - Sun 27th Jun 1627
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| Bandon (Barony) |
Francis Bernard - Tue 26th Nov 1793
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8 February 1979 |
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| Bangor (Barony) |
Bernard Ward - Wed 30th May 1770
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| Bantry (Barony) |
Richard White - Fri 24th Mar 1797
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30 November 1891 |
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| Barnewall (Viscountcy) |
Nicholas Barnewall - Fri 29th Jun 1646
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| Barrington (Viscountcy) |
John Barrington - Mon 1st Jul 1720
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6 April 1990 |
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| Bateman (Viscountcy) |
William Bateman - Thu 12th Jul 1725
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| Beaumont (Viscountcy) |
Thomas Beaumont - Fri 20th May 1622
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| Belfield (Barony) |
Robert Rochfort - Sun 16th Mar 1738
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| Bellew (Barony) |
John Bellew - Tue 29th Oct 1686
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| Bellew (Barony) |
Patrick Bellew - Mon 10th Jul 1848
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| of Bellomont (Earldom) |
Charles Henry Kirkhoven - Tue 11th Feb 1681
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| Bellomont (Viscountcy) |
Henry Bard - Tue 18th Jul 1645
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| Belmore (Barony) |
Armar Lowry Corry - Sat 6th Jan 1781
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| Bessborough (Barony) |
William Ponsonby - Thu 11th Sep 1721
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| Blakeney (Barony) |
William Blakeney - Sat 18th Dec 1756
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| Blayney (Barony) |
Edward Blayney - Thu 29th Jul 1621
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18 January 1874 |
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| Blesington (Viscountcy) |
Murrough Boyle - Wed 23rd Aug 1673
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22 May 1732 |
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| Bloomfield (Barony) |
Benjamin Bloomfield - Sat 14th May 1825
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17 August 1879 |
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| Blundell (Viscountcy) |
Montagu Blundell - Fri 22nd Nov 1720
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