The Dillon Baronetcy of Lismullen, in County Meath was created in

Baronetage of the United Kingdom Baronets are a rank in the British aristocracy. The current Baronetage of the United Kingdom has replaced the earlier but existing Baronetages of England, Nova Scotia, Ireland, and Great Britain. Baronetage of England (1611–1705) James I of E ...

in 1801. It became extinct with the death of the 8th Baronet in 1982. The

baronets A baronet ( or ; abbreviated Bart or Bt) or the female equivalent, a baronetess (, , or ; abbreviation Btss), is the holder of a baronetcy, a hereditary title awarded by the British Crown. The title of baronet is mentioned as early as the 14t ...

also held the title of Baron Dillon of the Holy Roman Empire, which was granted by Imperial Letters Patent of the Emperor Joseph II dated 4 July 1783. The ancestral motto is ''Whilst I breathe I hope''. Royal Licence to use this title was granted by King George III on 22 February 1784.

Dillon baronets, of Lismullen (1801)

Sir John Talbot Dillon, 1st Baronet Sir John Talbot Dillon, 1st Baronet, Baron Dillon (1739 – 17 July 1805) was an Irish politician and baronet. Career Dillon was the son of Arthur Dillon and Elizabeth Lambert, daughter of Ralph Lambert; and grandson of Sir John Dillon of Lismul ...

(1739–1805) *

Sir Charles Drake Dillon, 2nd Baronet ''Sir'' is a formal honorific address in English for men, derived from Sire in the High Middle Ages. Both are derived from the old French "Sieur" (Lord), brought to England by the French-speaking Normans, and which now exist in French only as ...

(died 1840) * Sir Arthur Richard Dillon, 3rd Baronet (died 1845) *

Sir William Dillon, 4th Baronet ''Sir'' is a formal honorific address in English for men, derived from Sire in the High Middle Ages. Both are derived from the old French "Sieur" (Lord), brought to England by the French-speaking Normans, and which now exist in French only as ...

(1774–1851) * Sir Arthur Henry Dillon, 5th Baronet (1828–1852) * Sir John Dillon, 6th Baronet (1806–1875) *

Sir John Fox Dillon, 7th Baronet ''Sir'' is a formal honorific address in English for men, derived from Sire in the High Middle Ages. Both are derived from the old French "Sieur" (Lord), brought to England by the French-speaking Normans, and which now exist in French only ...

(1843–1925) *

Sir Robert Dillon, 8th Baronet ''Sir'' is a formal honorific address in English for men, derived from Sire in the High Middle Ages. Both are derived from the old French "Sieur" (Lord), brought to England by the French-speaking Normans, and which now exist in French only ...

(1914–1982); brother of

Michael Dillon Laurence Michael Dillon (born Laura Maud Dillon; 1 May 1915 – 15 May 1962) was a physician and the first trans man to undergo phalloplasty. Early life and transition Dillon was the second child of Robert Arthur Dillon (1865–1925), heir to ...

(1915–1962)

, the brother of Sir Robert Dillon, was assigned as female at birth in 1915. However, during 1944–1949, Michael Dillon became one of the first transgender men to undergo a successful legal and medical gender reassignment from female to male, including genital surgery and hormone therapy. In 1958, ''

Debrett's Peerage Debrett's () is a British professional coaching company, publisher and authority on etiquette and behaviour, founded in 1769 with the publication of the first edition of ''The New Peerage''. The company takes its name from its founder, John Deb ...

'' thus listed Michael as heir to his brother's baronetcy, while '' Burke's Peerage'' continued to list Michael as a sister, using the name and gender from the original pre-1944 birth certificate. The editor of ''Debrett's'' told '' Time'' magazine that Michael Dillon was unquestionably next in line for the baronetcy, saying: "I have always been of the opinion that a person has all rights and privileges of the sex that is, at a given moment, recognized." Since Michael died before Robert, his candidacy to inherit the baronetcy ultimately became moot.

Notes

{{s-end Extinct baronetcies in the Baronetage of the United Kingdom