| Count | Generation, name, (birth - death) |
|---|
| 1 |
1 Seymour, Hugh de Grey, Marquess of Hertford
(1843-10-22 - 1912-03-23)
|
| 2 |
2 Seymour, George Francis Alexander, Marquess of Hertford
(1871-10-20 - 1940-02-16)
|
| 3 |
2 Seymour, Henry Charles
(1878-05-18 - 1939-06-18)
|
| 4 |
3 Seymour, Margaret Katherine
(1918-05-09 - 1975-05-24)
|
| 5 |
4 Hay, Edward Philip Gerald
(1949-12-22 - )
|
| 6 |
4 Hay, Andrew Nicholas John
(1951-10-10 - )
|
| 7 |
4 Hay, Simon Henry Peter
(1955-11-23 - )
|
| 8 |
3 Seymour, Hugh Edward Conway, Marquess of Hertford
(1930-03-29 - 1997-12-22)
|
| 9 |
4 Seymour, Henry Jocelyn, Marquess of Hertford
(1958-07-06 - )
|
| 10 |
5 Seymour, Gabriella Helen
(1992-04-23 - )
|
| 11 |
5 Seymour, William Francis
(1993-11-02 - )
|
| 12 |
5 Seymour, Edward George
(1995-01-24 - )
|
| 13 |
5 Seymour, Antonia Louisa
(1998-07-24 - )
|
| 14 |
1 Seymour, Albert Charles
(1847-04-24 - 1891-03-24)
|
| 15 |
2 Seymour, Charles Hugh Napier
(1874-11-11 - 1933-03-15)
|
| 16 |
3 Seymour, William Napier
(1914-09-08 - 2011-06-22)
|
| 17 |
4 Hanbury, Carolyn Sarah
(1946-03-21 - )
|
| 18 |
5 Hanbury, Serena Mary
(1970 - )
|
| 19 |
1 Seymour, Ernest James
(1850-05-10 - 1930-01-23)
|
| 20 |
2 Seymour, Francis Ernest
(1878-10-07 - 1952-05-21)
|
| 21 |
2 Seymour, Reginal Guy
(1880-01-15 - 1965-01-04)
|
| 22 |
2 Seymour, Arthur George
(1884-10-19 - 1935-07-22)
|