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An excerpt from www.HouseOfNames.com archives copyright 2000 - 2015

Where did the Irish Cassidy family come from? What is the Irish Cassidy family crest and coat of arms? When did the Cassidy family first arrive in the United States? Where did the various branches of the family go? What is the Cassidy family history?

Irish names tend to vary widely in their spelling and overall form. The original Gaelic form of the name Cassidy is O Caiside.


Names from the Middle Ages demonstrate many spelling variations. This is because the recording scribe or church official often decided as to how a person's name was spelt and in what language. Research into the name Cassidy revealed many variations, including Cassidy, Cassady, Cassiday, Cassedy, Cassedey and others.

First found in Fermanagh (Irish: Fear Manach) in the southwestern part of Northern Ireland, Province of Ulster, where the Irish sept claims direct descent from the Irish King Colla da Crioch who was banished from Ireland in 327.


This web page shows only a small excerpt of our Cassidy research. Another 191 words (14 lines of text) covering the years 1143, 1143 and 1740 are included under the topic Early Cassidy History in all our PDF Extended History products.


Another 35 words (2 lines of text) are included under the topic Early Cassidy Notables in all our PDF Extended History products.


To escape the religious and political discrimination they experienced primarily at the hands of the English, thousands of Irish left their homeland in the 19th century. These migrants typically settled in communities throughout the East Coast of North America, but also joined the wagon trains moving out to the Midwest. Ironically, when the American War of Independence began, many Irish settlers took the side of England, and at the war's conclusion moved north to Canada. These United Empire Loyalists, were granted land along the St. Lawrence River and the Niagara Peninsula. Other Irish immigrants settled in Newfoundland, the Ottawa Valley, New Brunswick and Nova Scotia. The greatest influx of Irish immigrants, however, came to North America during the Great Potato Famine of the late 1840s. Thousands left Ireland at this time for North America and Australia. Many of those numbers, however, did not live through the long sea passage. These Irish settlers to North America were immediately put to work building railroads, coal mines, bridges, and canals. Irish settlers made an inestimable contribution to the building of the New World. Early North American immigration records have revealed a number of people bearing the Irish name Cassidy or a variant listed above, including:

  • Patrick Cassidy who settled in Rhode Island, and later moved to Norwich in Connecticut, where he became one of America's first surgeons

Cassidy Settlers in United States in the 19th Century

  • Pat Cassidy, aged 17, arrived in New York, NY in 1803
  • Patt Cassidy, aged 17, landed in New York, NY in 1803
  • Chris Cassidy, who landed in New York, NY in 1811
  • Francis Cassidy, who landed in Baltimore, Maryland in 1811
  • Elizabeth Cassidy, who landed in Philadelphia, Pennsylvania in 1812

Cassidy Settlers in Canada in the 19th Century

  • James Cassidy, who landed in Nova Scotia in 1809
  • Margaret Cassidy, who landed in Nova Scotia in 1812
  • Jane Cassidy, aged 30, arrived in Saint John, NB in 1833 aboard the schooner "Sarah" from Belfast
  • John Cassidy a painter, arrived in Saint John, NB aboard the ship "Zephyr" in 1833
  • Owen Cassidy, aged 35, a labourer, arrived in Saint John, NB aboard the ship "Cupid" in 1834

Cassidy Settlers in Australia in the 19th Century

  • John Cassidy, Canadian convict from Montreal, who was transported aboard the "Ann" on August 1809, settling in New South Wales, Australia
  • Samuel Cassidy arrived in Adelaide, Australia aboard the ship "Diadem" in 1840
  • Elizabeth Cassidy arrived in Adelaide, Australia aboard the ship "Abberton" in 1846
  • Mary Jane Cassidy arrived in Adelaide, Australia aboard the ship "Abberton" in 1846
  • Mary Cassidy arrived in Adelaide, Australia aboard the ship "Trafalgar" in 1847

Cassidy Settlers in New Zealand in the 19th Century

  • Thomas Cassidy landed in Hokianga, New Zealand in 1837
  • James Cassidy, aged 20, a blacksmith, arrived in Auckland, New Zealand aboard the ship "Helenslee" in 1864
  • Catherine Cassidy arrived in Auckland, New Zealand aboard the ship "Andrew Jackson" in 1865
  • Mary Cassidy, aged 50, arrived in Auckland, New Zealand aboard the ship "Lauderdale" in 1874
  • John Cassidy, aged 18, a farm labourer, arrived in Wellington, New Zealand aboard the ship "Hermione" in 1878


  • Katherine Evelyn "Katie" Cassidy (b. 1986), American two-time Teen Choice Award nominated actress, known for her roles in Arrow (2012), Taken (2008) and Click (2006), daughter of David Cassidy
  • John Joseph Edward "Jack" Cassidy (1927-1976), American two-time Primetime Emmy Award nominated actor of stage, film and screen, known for The Eiger Sanction (1975), Mister Magoo's Christmas Carol (1962) and The Hollywood Squares (1965)
  • David Cassidy (b. 1950), American Primetime Emmy Award nominated musician, actor best known for his role in the "Partridge Family," son of Jack Cassidy
  • James Edwin Cassidy (1869-1951), American Roman Catholic bishop in Massachusetts
  • Eva Cassidy (1963-1996), American singer
  • Commander, USN Christopher J. Cassidy (b. 1970), NASA Astronaut with over 376 hours in space
  • John Cassidy (b. 1967), American magician
  • Joanna Cassidy (b. 1945), American actress
  • Butch Cassidy (1866-1908), born Robert Leroy Parker, notorious train and bank robber of the Wild West, leader of the Wild Bunch Gang
  • Mr. Bernard Cassidy (d. 1915), Irish Fireman from Liverpool, England, who worked aboard the RMS Lusitania and died in the sinking



The motto was originally a war cry or slogan. Mottoes first began to be shown with arms in the 14th and 15th centuries, but were not in general use until the 17th century. Thus the oldest coats of arms generally do not include a motto. Mottoes seldom form part of the grant of arms: Under most heraldic authorities, a motto is an optional component of the coat of arms, and can be added to or changed at will; many families have chosen not to display a motto.

Motto: Frangas non flectes
Motto Translation: Thou may'st break, but shalt not bend me.


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  1. Passenger Lists of Vessels Arriving at Galveston Texas 1896-1951. National Archives Washington DC. Print.
  2. MacLysaght, Edward. Mores Irish Familes. Dublin: Irish Academic, 1982. Print. (ISBN 0-7165-0126-0).
  3. Magnusson, Magnus. Chambers Biographical Dictionary 5th edition. Edinburgh: W & R Chambers, 1990. Print.
  4. Grehan, Ida. Dictionary of Irish Family Names. Boulder: Roberts Rinehart, 1997. Print. (ISBN 1-57098-137-X).
  5. Harris, Ruth-Ann and B. Emer O'Keefe. The Search for Missing Friends Irish Immigrant Advertisements Placed in the Boston Pilot Volume II 1851-1853. Boston, MA: New England Historic Genealogical Society, 1991. Print.
  6. Tepper, Michael Ed & Elizabeth P. Bentley Transcriber. Passenger Arrivals at the Port of Philadelphia 1800-1819. Baltimore: Genealogical Publishing Co., 1986. Print.
  7. Colletta, John P. They Came In Ships. Salt Lake City: Ancestry, 1993. Print.
  8. Weis, Frederick Lewis, Walter Lee Sheppard and David Faris. Ancestral Roots of Sixty Colonists Who Came to New England Between 1623 and 1650 7th Edition. Baltimore: Genealogical Publishing, 1992. Print. (ISBN 0806313676).
  9. Browning, Charles H. Americans of Royal Descent. Baltimore: Genealogical Publishing. Print.
  10. Shaw, William A. Knights of England A Complete Record from the Earliest Time to the Present Day of the Knights of all the Orders of Chivalry in England, Scotland, Ireland and Knights Bachelors 2 Volumes. Baltimore: Genealogical Publishing. Print. (ISBN 080630443X).
  11. ...

The Cassidy Family Crest was acquired from the Houseofnames.com archives. The Cassidy Family Crest was drawn according to heraldic standards based on published blazons. We generally include the oldest published family crest once associated with each surname.

This page was last modified on 3 October 2015 at 20:11.

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