| George Augustus Herbert |
of Pembroke (Earldom) |
Sun 26th Jan 1794 |
Fri 26th Oct 1827 |
| Robert Henry Herbert |
of Pembroke (Earldom) |
Fri 26th Oct 1827 |
Fri 25th Apr 1862 |
| George William Herbert |
of Powis, in the County of Montgomery (Earldom) |
Fri 7th Oct 1988 |
Fri 13th Aug 1993 |
| Edward Clive |
of Powis, in the County of Montgomery (Earldom) |
Mon 14th May 1804 |
Thu 16th May 1839 |
| Christian Victor Charles Herbert |
of Powis, in the County of Montgomery (Earldom) |
Tue 15th Jan 1974 |
Fri 7th Oct 1988 |
| John George Herbert |
of Powis, in the County of Montgomery (Earldom) |
Fri 13th Aug 1993 |
|
| Edward Herbert |
of Powis, in the County of Montgomery (Earldom) |
Thu 16th May 1839 |
Mon 17th Jan 1848 |
| Edward James Herbert |
of Powis, in the County of Montgomery (Earldom) |
Mon 17th Jan 1848 |
Thu 7th May 1891 |
| George Charles Herbert |
of Powis, in the County of Montgomery (Earldom) |
Thu 7th May 1891 |
Sun 9th Nov 1952 |
| Edward Robert Henry Herbert |
of Powis, in the County of Montgomery (Earldom) |
Sun 9th Nov 1952 |
Tue 15th Jan 1974 |
| John Petre |
Petre (Barony) |
Mon 21st Jul 1603 |
Fri 11th Oct 1613 |
| John Patrick Lionel Petre |
Petre (Barony) |
Sun 1st Jan 1989 |
|
| Joseph William Lionel Petre |
Petre (Barony) |
Thu 30th Sep 1915 |
Sun 1st Jan 1989 |
| Robert Edward Petre |
Petre (Barony) |
Mon 2nd Jul 1742 |
Thu 2nd Jul 1801 |
| Robert Edward Petre |
Petre (Barony) |
Thu 2nd Jul 1801 |
Tue 28th Mar 1809 |
| William Henry Francis Petre |
Petre (Barony) |
Tue 28th Mar 1809 |
Wed 3rd Jul 1850 |
| William Bernard Petre |
Petre (Barony) |
Wed 3rd Jul 1850 |
Fri 4th Jul 1884 |
| William Joseph Petre |
Petre (Barony) |
Fri 4th Jul 1884 |
Mon 8th May 1893 |
| Bernard Henry Philip Petre |
Petre (Barony) |
Mon 8th May 1893 |
Tue 16th Jun 1908 |
| Philip Benedict Joseph Petre |
Petre (Barony) |
Tue 16th Jun 1908 |
Sun 6th Dec 1908 |