Show ContentsHennessy History, Family Crest & Coats of Arms

Etymology of Hennessy

What does the name Hennessy mean?

Today's Irish surnames are underpinned by a multitude of rich histories. The name Hennessy originally appeared in Gaelic as Ó hAonghusa, which means "descendant of Angus." 1

Early Origins of the Hennessy family

The surname Hennessy was first found in County Offaly (Irish: Uíbh Fháilí) originally the Kingdom of Uí Failghe, located in central Ireland in the Province of Leinster, where they held a family seat from very ancient times.

Early History of the Hennessy family

This web page shows only a small excerpt of our Hennessy research. Another 81 words (6 lines of text) are included under the topic Early Hennessy History in all our PDF Extended History products and printed products wherever possible.

Hennessy Spelling Variations

Pronunciation, rather than spelling, guided scribes and church officials when recording names during the Middle Ages. This practice often resulted in one person's name being recorded under several different spellings. Numerous spelling variations of the surname Hennessy are preserved in these old documents. The various spellings of the name that were found include Hennessey, Henasey, Henasay, Henchy, Henchey, Henchie, Hinchy, Hinchey, Hinchie, Henesey, Henessy, Henesy, Hennesey and many more.

Early Notables of the Hennessy family

More information is included under the topic Early Hennessy Notables in all our PDF Extended History products and printed products wherever possible.

Hennessy Ranking

In the United States, the name Hennessy is the 5,161st most popular surname with an estimated 4,974 people with that name. 2 However, in Australia, the name Hennessy is ranked the 844th most popular surname with an estimated 4,674 people with that name. 3


Hennessy migration to the United States +

A massive amount of Ireland's native population left the island in the 19th century for North America and Australia in hopes of finding more opportunities and an escape from discrimination and oppression. A great portion of these migrants arrived on the eastern shores of the North American continent. Although they were generally poor and destitute, and, therefore, again discriminated against, these Irish people were heartily welcomed for the hard labor involved in the construction of railroads, canals, roadways, and buildings. Many others were put to work in the newly established factories or agricultural projects that were so essential to the development of what would become two of the wealthiest nations in the world. The Great Potato Famine during the late 1840s initiated the largest wave of Iris immigration. Early North American immigration and passenger lists have revealed a number of people bearing the name Hennessy or a variant listed above:

Hennessy Settlers in United States in the 19th Century
  • Michael Hennessy, who arrived in New York, NY in 1848 4
  • Cath Hennessy, aged 16, who landed in New York in 1854 4
  • Thomas Hennessy, aged 25, who arrived in New York in 1854 4
  • Dennis, Edward, George, James, John, Michael, Patrick, Thomas and William Hennessy, who arrived in Philadelphia between 1800 and 1860
  • Mary Hennessy, aged 20, who landed in New York in 1864 4
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)

Hennessy migration to Canada +

Some of the first settlers of this family name were:

Hennessy Settlers in Canada in the 19th Century
  • John Hennessy, who arrived in Nova Scotia in 1822
  • Frances Hennessy, who arrived in Nova Scotia in 1830
  • John Hennessy, aged 32, a labourer, who arrived in Saint John, New Brunswick in 1833 aboard the brig "William" from Cork, Ireland
  • Betsy Hennessy, aged 25, who arrived in Saint John, New Brunswick aboard the ship "Sea Horse" in 1833
  • Thomas Hennessy, aged 40, who arrived in Saint John, New Brunswick in 1834 aboard the brig "Ann & Mary" from Cork, Ireland
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)

Hennessy migration to Australia +

Emigration to Australia followed the First Fleets of convicts, tradespeople and early settlers. Early immigrants include:

Hennessy Settlers in Australia in the 19th Century
  • Mary Hennessy, Irish convict from Clomenl, Ireland, who was transported aboard the "Asia" on September 3rd, 1820, settling in New South Wales, Australia 5
  • Mr. Peter Hennessy, (b. 1767), aged 53, Irish plough maker who was convicted in Dublin, Ireland for 7 years for felony, transported aboard the "Dorothy" on 5th May 1820, arriving in New South Wales, Australia 6
  • Mr. John Hennessy, (b. 1796), aged 26, Irish coachman who was convicted in Cork, Ireland for 7 years, transported aboard the "Countess of Harcourt" on 3rd September 1822, arriving in New South Wales, Australia 7
  • Mr. Maurice Hennessy, (b. 1804), aged 19, Irish ploughman who was convicted in Waterford, Ireland for life, transported aboard the "Castle Forbes" on 28th September 1823, arriving in New South Wales, Australia, he died in 1863 8
  • Mr. Patrick Hennessy, (b. 1810), aged 22, Irish errand boy who was convicted in Cork, Ireland for life for highway robbery, transported aboard the "Eliza" on 10th May 1832, arriving in New South Wales, Australia 9
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)

Hennessy migration to New Zealand +

Emigration to New Zealand followed in the footsteps of the European explorers, such as Captain Cook (1769-70): first came sealers, whalers, missionaries, and traders. By 1838, the British New Zealand Company had begun buying land from the Maori tribes, and selling it to settlers, and, after the Treaty of Waitangi in 1840, many British families set out on the arduous six month journey from Britain to Aotearoa to start a new life. Early immigrants include:

Hennessy Settlers in New Zealand in the 19th Century
  • Miss Eliza Hennessy, British settler travelling from Gravesend, UK aboard the ship "Dinapore" arriving in Auckland, New Zealand on 5th August 1857 10
  • Mr. John Hennessy, British settler travelling from London aboard the ship "John Scott" arriving in Auckland, New Zealand on 7th March 1858 10
  • Patrick Hennessy, aged 28, a labourer, who arrived in Auckland, New Zealand aboard the ship "Alfred" in 1864 11
  • Helen Hennessy, aged 24, who arrived in Auckland, New Zealand aboard the ship "Alfred" in 1864 11
  • Frederick Hennessy, who arrived in Auckland, New Zealand aboard the ship "Alfred" in 1864 11
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)

Contemporary Notables of the name Hennessy (post 1700) +

  • Jeffrey Hennessy (1929-2015), United States trampolining team coach from 1964 to 1980
  • Joshua Hennessy (b. 1985), American professional NHL ice hockey player
  • Larry Hennessy (1929-2008), American NBA basketball player
  • David C. Hennessy (1858-1890), American police chief in New Orleans, Louisiana who was assassinated in 1890, the subsequent trial led to a not guilty verdict causing a mob to rush the prison and lynch 11 of the 19 Italians accused, which later became the subject of the movie Vendetta (1999)
  • Frank J. Hennessy, American Democratic Party politician, Delegate to Democratic National Convention from California, 1916, 1928; U.S. Attorney for the Northern District of California, 1937-51 12
  • Frank H. Hennessy, American Democratic Party politician, Candidate for U.S. Representative from New Jersey 9th District, 1942 12
  • Daniel J. Hennessy, American Democratic Party politician, Member of Montana State Senate 10th District, 1889-92 12
  • Charles O'Connor Hennessy (b. 1860), American Democratic Party politician, Member of New Jersey State House of Assembly from Bergen County, 1912-13; Member of New Jersey State Senate from Bergen County, 1914-16 12
  • Charles E. Hennessy, American politician, Candidate for Presidential Elector for Ohio, 1928 12
  • Carol Hennessy, American Democratic Party politician, Candidate for Michigan State Senate 30th District, 1998 12
  • ... (Another 25 notables are available in all our PDF Extended History products and printed products wherever possible.)

Hillsborough disaster
  • James Robert Hennessy (1959-1989), English plasterer who was attending the FA Cup semi-final at Hillsborough Stadium, in Sheffield, Yorkshire when the stand allocated area became overcrowded and 96 people were crushed in what became known as the Hillsborough disaster and he died from his injuries 13
HMS Hood
  • Mr. David T Hennessy (b. 1924), Scottish Boy 1st Class serving for the Royal Navy from Dundee, Angus, Scotland, who sailed into battle and died in the HMS Hood sinking 14
SS Atlantic
  • Mr. John Hennessy, who was traveling aboard the ship "SS Atlantic" when it struck rocks off Nova Scotia in 1873, died in the sinking


  1. O'Hart, John, Irish Pedigrees 5th Edition in 2 Volumes. Baltimore: Genealogical Publishing Company, 1976. Print. (ISBN 0-8063-0737-4)
  2. "What are the 5,000 Most Common Last Names in the U.S.?". NameCensus.com, https://namecensus.com/last-names/
  3. "Most Common Last Names in Australia." Forebears, https://forebears.io/australia/surnames
  4. Filby, P. William, Meyer, Mary K., Passenger and immigration lists index : a guide to published arrival records of about 500,000 passengers who came to the United States and Canada in the seventeenth, eighteenth, and nineteenth centuries. 1982-1985 Cumulated Supplements in Four Volumes Detroit, Mich. : Gale Research Co., 1985, Print (ISBN 0-8103-1795-8)
  5. State Library of Queensland. (Retrieved 2016, October 27) Asia 1 voyage to Van Diemen's Land, Australia in 1820 with 192 passengers. Retrieved from http://www.convictrecords.com.au/ships/asia/1820
  6. Convict Records Voyages to Australia (Retrieved 12th July 2021). Retrieved from https://convictrecords.com.au/ships/dorothy
  7. Convict Records Voyages to Australia (Retrieved 24th March 2021). Retrieved from https://convictrecords.com.au/ships/countess-of-harcourt
  8. Convict Records of Australia. Retreived 2nd January 2021 from https://convictrecords.com.au/ships/castle-forbes
  9. Convict Records Voyages to Australia (Retrieved 28th February 2022). Retrieved from https://convictrecords.com.au/ships/eliza
  10. New Zealand Yesteryears Passenger Lists 1800 to 1900 (Retrieved 17th October 2018). Retrieved from http://www.yesteryears.co.nz/shipping/passlist.html
  11. Archives New Zealand Micro 5019. (Retrieved 2010, November 5) Alfred. Retrieved from http://freepages.genealogy.rootsweb.ancestry.com/~ourstuff/Alfred1864.htm
  12. The Political Graveyard: Alphabetical Name Index. (Retrieved 2015, October 7) . Retrieved from http://politicalgraveyard.com/alpha/index.html
  13. Hillsborough Victims (retreived 21st March 2021). Retreived from https://metro.co.uk/2019/04/15/remembering-96-victims-hillsborough-disaster-30-years-9206566/
  14. H.M.S. Hood Association-Battle Cruiser Hood: Crew Information - H.M.S. Hood Rolls of Honour, Men Lost in the Sinking of H.M.S. Hood, 24th May 1941. (Retrieved 2016, July 15) . Retrieved from http://www.hmshood.com/crew/memorial/roh_24may41.htm


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