| Count | Generation, name, (birth - death) |
| 1 |
1 Gascoyne-Cecil, Beatrice Edith Mildred
(1891-08-10 - 1980)
|
| 2 |
2 Ormsby-Gore, William David, Baron Harlech
(1918-05-20 - 1985-01-26)
|
| 3 |
3 Ormsby-Gore, Francis David, Baron Harlech
(1954-03-13 - 2016-02-01)
|
| 4 |
4 Ormsby-Gore, Jasset David, Baron Harlech
(1986-07-01 - )
|
| 5 |
1 Gascoyne-Cecil, Robert Arthur James, Marquess of Salisbury
(1893-08-27 - 1972-02-23)
|
| 6 |
2 Gascoyne-Cecil, Robert Edward Peter, Marquess of Salisbury
(1916-10-24 - 2003-07-11)
|
| 7 |
3 Gascoyne-Cecil, Robert Michael James, Marquess of Salisbury
(1946-09-30 - )
|
| 8 |
4 Gascoyne-Cecil, Robert Edward William
(1970-12-18 - )
|
| 9 |
4 Gascoyne-Cecil, James Richard
(1973-11 - )
|
| 10 |
5 Gascoyne-Cecil, Thomas Richard James
(2009 - )
|
| 11 |
3 Gascoyne-Cecil, Richard Valentine
(1948-01-26 - 1978-04-20)
|
| 12 |
3 Gascoyne-Cecil, Charles Edward Vere
(1949-07-13 - )
|
| 13 |
3 Gascoyne-Cecil, Valentine William
(1952-05-13 - )
|
| 14 |
3 Cecil, Rose Alice Elizabeth
(1956-09-11 - )
|
| 15 |
3 Cecil, Michael Hugh
(1960-03-23 - )
|
| 16 |
4 Cecil, Daisy Alice Julia
(1989-10-23 - )
|
| 17 |
4 Gascoyne Cecil, Hubert George
(1992-03 - )
|
| 18 |
4 Cecil, Edward William James
(1996-06-29 - )
|
| 19 |
2 Gascoyne-Cecil, Michael Charles James
(1918-10-27 - 1934-10-27)
|
| 20 |
2 Gascoyne-Cecil, Richard Hugh Vere
(1924-01-31 - 1944-08-12)
|
| 21 |
1 Gascoyne-Cecil, Mary Alice
(1895-07-29 - 1988)
|
| 22 |
2 Cavendish, William John Robert
(1917-12-10 - 1944-09-10)
|
| 23 |
2 Cavendish, Andrew Robert Buxton, Duke of Devonshire
(1920-01-02 - 2004-05-03)
|
| 24 |
3 Tennant, Emma (1937)
(1937 - )
|
| 25 |
4 Tennant, Edward Tobias
(1967-03 - )
|
| 26 |
4 Tennant, Stella
(1970-12-17 - )
|
| 27 |
3 Cavendish, Peregrine Andrew Morny, Duke of Devonshire
(1944-04-27 - )
|
| 28 |
4 Cavendish, William (1969)
(1969-06-06 - )
|
| 29 |
5 Cavendish, Maude
(2009-03 - )
|
| 30 |
5 Cavendish, James (2010)
(2010-12 - )
|
| 31 |
5 Cavendish, Elinor Myrtle
(2013 - )
|
| 32 |
3 Morrison, Sophia Louise Sydney
(1957-03-18 - )
|
| 33 |
4 Morrison, Declan James
(1993-07-11 - )
|
| 34 |
4 Morrison, Nancy Lorna
(1995-01-22 - )
|
| 35 |
2 Tree, Anne Evelyn Beatrice
(1927-11-06 - 2010-08-09)
|