There have been two Baronetcies created for members of the Guinness brewing family

Guinness family

The Guinness family is an extensive aristocratic Irish Protestant family noted for their accomplishments in brewing, banking, politics and religious ministry...

, both in the Baronetage of the United Kingdom. Both titles are still extant.

The Guinness Baronetcy, of Ashford in the County of Galway, is a title in the Baronetage of the United Kingdom. It was created on 15 April 1867 for the brewer, philanthropist and Conservative

Conservative Party (UK)

The Conservative Party, formally the Conservative and Unionist Party, is a centre-right political party in the United Kingdom that adheres to the philosophies of conservatism and British unionism. It is the largest political party in the UK, and is currently the largest single party in the House...

 Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 Benjamin Guinness. He was the grandson of Arthur Guinness

Arthur Guinness

Arthur Guinness was an Irish brewer and the founder of the Guinness brewery business and family.He was also an entrepreneur, visionary and philanthropist....

, the founder of the Guinness

Guinness

Guinness is a popular Irish dry stout that originated in the brewery of Arthur Guinness at St. James's Gate, Dublin. Guinness is directly descended from the porter style that originated in London in the early 18th century and is one of the most successful beer brands worldwide, brewed in almost...

 brewery. His son, the second Baronet, was also a businessman and Conservative politician and contributed to numerous charitable causes. On 1 May 1880 he was created Baron Ardilaun, of Ashford in the County of Galway, in the Peerage of the United Kingdom

Peerage of the United Kingdom

The Peerage of the United Kingdom comprises most peerages created in the United Kingdom of Great Britain and Ireland after the Act of Union in 1801, when it replaced the Peerage of Great Britain...

.

Lord Ardilaun was childless and the barony became extinct on his death in 1915. However, he was succeeded in the baronetcy by his nephew, the third Baronet, the son of Benjamin Lee Guinness, second son of the first Baronet. the title is held by the third Baronet's greatnephew, the fifth Baronet.

The Guinness Baronetcy, of Castle Knock, was created in the Baronetage of the United Kingdom on 27 May 1885 for Edward Guinness

Edward Guinness, 1st Earl of Iveagh

Edward Cecil Guinness, 1st Earl of Iveagh, KP, GCVO, FRS was an Irish philanthropist and businessman.-Public life:...

. He was the third son of the first Baronet of the 1867 creation. Guinness was later elevated to the peerage as Earl of Iveagh

Earl of Iveagh

Earl of Iveagh is a title in the Peerage of the United Kingdom. It was created in 1919 for the businessman and philanthropist Edward Guinness, 1st Viscount Iveagh. He was the third son of Sir Benjamin Guinness, 1st Baronet, of Ashford, and the great-grandson of Arthur Guinness, the founder of the...

. For more information, see this title. Another member of the family was Walter Guinness, 1st Baron Moyne

Walter Guinness, 1st Baron Moyne

Walter Edward Guinness, 1st Baron Moyne DSO & Bar PC was a Anglo-Irish politician and businessman. He served as the British minister of state in the Middle East until November 1944, when he was assassinated by the militant Jewish Zionist group Lehi...

. He was the third son of the first Earl of Iveagh.

Guinness Baronets, of Ashford (1867)

• Sir Benjamin Lee Guinness, 1st Baronet (1798–1868)
• Sir Arthur Edward Guinness, 2nd Baronet
  Arthur Guinness, 1st Baron Ardilaun
  Arthur Edward Guinness, 1st Baron Ardilaun, 2nd Baronet , known as Sir Arthur Guinness, Bt, between 1868 and 1880, was an Irish businessman, politician, and philanthropist, best known for giving St Stephen's Green to the people of Dublin.-Background and education:Guinness was born at St Anne's,...
  
   (1840–1915) (created Baron Ardilaun in 1880)

Barons Ardilaun (1880)

• Arthur Edward Guinness, 1st Baron Ardilaun
  Arthur Guinness, 1st Baron Ardilaun
  Arthur Edward Guinness, 1st Baron Ardilaun, 2nd Baronet , known as Sir Arthur Guinness, Bt, between 1868 and 1880, was an Irish businessman, politician, and philanthropist, best known for giving St Stephen's Green to the people of Dublin.-Background and education:Guinness was born at St Anne's,...
  
  (1840–1915)

Guinness Baronets, of Ashford (1867; Reverted)

• Sir Algernon Arthur St Lawrence Lee Guinness, 3rd Baronet (1883–1954)

• Sir Kenelm Ernest Lee Guinness, 4th Baronet (1928–2011)
• Sir Kenelm Edward Lee Guinness, 5th Baronet (b. 1962)