Show ContentsReilley History, Family Crest & Coats of Arms

The Reilley surname originally appeared in Gaelic as Ó Raghailligh, which means descendant of Raghallach.

Early Origins of the Reilley family

The surname Reilley was first found in County Cavan. They were known as the Princes of East Breffny, descended from Raghallaigh, Prince of Breffny in 981. They maintained their territory during the Anglo/Norman invasion of Strongbow, Earl of Pembroke, in 1172, but Sir John O'Reilly, Prince of Breffny surrendered the principality to Queen Elizabeth I thereby ensuring that his territories remained intact.

Early History of the Reilley family

This web page shows only a small excerpt of our Reilley research. Another 95 words (7 lines of text) covering the years 1598, 1630, 1640, 1646, 1667, 1669, 1689, 1691, 1695 and 1703 are included under the topic Early Reilley History in all our PDF Extended History products and printed products wherever possible.

Reilley Spelling Variations

Irish names were rarely spelled consistently in the Middle Ages. Spelling variations of the name Reilley dating from that time include O'Reilly, O'Reilley, O'Reily, O'Rielly, O'Riely, O'Riley, O'Rilley, Reel and many more.

Early Notables of the Reilley family

Notable amongst the family name at this time was Count John O'Reilly; Edmund O'Reilly (1598-1669), Roman Catholic Archbishop of Armagh; Hugh Reily (Reilly or O’Reilly) (c.1630-1695) Irish Member of Parliament for Cavan Borough in the Patriot Parliament of 1689; Philip Og O’Reilly (Gaelic was Phillip Óg O’Raghallaigh)(c.1640-1703), Irish...
Another 48 words (3 lines of text) are included under the topic Early Reilley Notables in all our PDF Extended History products and printed products wherever possible.

Reilley Ranking

In the United States, the name Reilley is the 18,490th most popular surname with an estimated 2,487 people with that name. 1


United States Reilley migration to the United States +

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 Reilley or a variant listed above, including:

Reilley Settlers in United States in the 19th Century
  • John Reilley, who arrived in Boston in 1823
  • Terrence Reilley, who landed in Pennsylvania in 1823 2
  • Patrick Reilley, who arrived in Allegany (Allegheny) County, Pennsylvania in 1842 2
  • Pedro Reilley, aged 60, who landed in New Orleans, La in 1846 2
  • Ann Reilley, aged 15, who landed in New York, NY in 1850 2
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)
Reilley Settlers in United States in the 20th Century
  • P Reilley, who arrived in Mississippi in 1905 2

Australia Reilley migration to Australia +

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

Reilley Settlers in Australia in the 19th Century
  • Mr. John Reilley, (Rielly, Riley, Reily), English shoe maker who was convicted in Stafford, Staffordshire, England for 15 years for highway robbery, transported aboard the "Bangalore" on 28th March 1848, arriving in Tasmania (Van Diemen's Land) from Bermuda 3
  • Laurence Reilley, aged 18, a labourer, who arrived in South Australia in 1854 aboard the ship "Isle of Thanet" 4
  • Elizabeth Reilley, aged 25, a domestic servant, who arrived in South Australia in 1854 aboard the ship "Lord of the Isles" 5
  • Mr. John Reilley, (b. 1823), aged 34, English sawyer, from County Meath, Ireland travelling aboard the ship "Herefordshire" arriving in New South Wales, Australia on 27th May 1857 6
  • Mrs. Caroline Reilley, (b. 1821), aged 36, Cornish house servant, from County Waterford, Ireland travelling aboard the ship "Herefordshire" arriving in New South Wales, Australia on 27th May 1857 6
  • ... (More are available in all our PDF Extended History products and printed products wherever possible.)

Contemporary Notables of the name Reilley (post 1700) +

  • Thomas T. Reilley (1884-1940), American football coach, the 12th head football coach at New York University
  • Alexander Aloysius "Duke" Reilley (1884-1968), nicknamed "Midget", American Major League Baseball player who played for one season for the Cleveland Naps in 1909
  • Charles Augustine "Charlie" Reilley (1856-1904), American Major League Baseball player who played from 1879 to 1884
  • Thomas T. Reilley, American politician, Member of New York State Assembly from New York County 21st District, 1916 7
  • Richard S. Reilley, American politician, Member of New York State Assembly from New York County 13th District, 1901-02 7
  • Patrick Reilley (1848-1924), American politician, Mayor of Hammond, Indiana, 1893-94, 1899-1902 7
  • George J. Reilley, American Republican politician, Delegate to Republican National Convention from Louisiana, 1900, 1908, 1916, 1920, 1940, 1944 7
  • Donna Reilley, American Democratic Party politician, Delegate to Democratic National Convention from New York, 1980 7
  • Hugh Reilley (1918-1940), Canadian fighter pilot who flew for the RAF during the Battle of Britain, killed in action
  • Schubert Reilley Dyche (1893-1982), American college football and college basketball head coach

St. Francis Dam
  • Mr. Peter F. Reilley, American resident in Santa Clarita killed when the St. Francis Dam failed and flooded the area in 1928


  1. "What are the 5,000 Most Common Last Names in the U.S.?". NameCensus.com, https://namecensus.com/last-names/
  2. 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)
  3. Convict Records Voyages to Australia (Retrieved 15th September 2020). Retrieved from https://convictrecords.com.au/ships/bangalore
  4. South Australian Register Wednesday 25th October 1854. (Retrieved 2010, November 5) Isle of Thanet 1854. Retrieved http://www.theshipslist.com/ships/australia/isleofthanet1854.shtml
  5. South Australian Register Monday 14th August 1854. (Retrieved 2010, November 5) Lord of the Isles 1854. Retrieved http://www.theshipslist.com/ships/australia/jamesfernie1854.shtml
  6. Cornwall Online Parish Clerks. (Retrieved 3rd May 2018). Retrieved from http://www.opc-cornwall.org/Resc/pdfs/emigration_nsw_1850_59.pdf
  7. The Political Graveyard: Alphabetical Name Index. (Retrieved 2015, November 3) . Retrieved from http://politicalgraveyard.com/alpha/index.html


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