Robert St John Fitzwalter (16th-26th Baron Dunboyne ) Butler
1844 - 1913 (69 years)
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| John Fitzwalter (19th-29th Baron Dunboyne) Butler | |
| B: | 1951 |
| D: | 2013 |
| Patrick Theobald Tower (18th-28th Baron Dunboyne) Butler | |
| B: | 1917 |
| D: | 2004 |
| Diana Caroline Williams | |
| M: | 1975 |
| Fitzwalter George Probyn (17th-27th Baron Dunboyne) Butler | |
| B: | 1874 |
| D: | 1975 |
| Lt Col. James Dighton Butler 1911-1987 |
| Lt Col. James Dighton Butler | |
| B: | 1911 |
| D: | 1987 |
| Pamela Pickwoad | |
| M: | 1943 |
| Brig Gen Hon. Lesley James Probyn Butler, CMG, DSO | |
| B: | 22 Apr 1876 |
| D: | 31 Dec 1955 |
 | Mary Christal Heathcoat-Amory Bef 1907-Yes, date unknown |
| Mary Christal Heathcoat-Amory | |
| B: | Bef 1907 |
| M: | 1907 |
| D: | Yes, date unknown |
| Robert St John Fitzwalter (16th-26th Baron Dunboyne ) Butler | |
| B: | 1844 |
| D: | 1913 |