Show ContentsO'Haleran History, Family Crest & Coats of Arms

The name O'Haleran originally appeared in Gaelic as Ó hAllmhurain, which is derived from the word allmhurach, which means pirate. 1

The main branch of the family claim descent through the O'Connors (Kings of Connaught) and as such from the Heremon Kings of Ireland. 2

Early Origins of the O'Haleran family

The surname O'Haleran was first found in counties of Clare and Galway (Irish: Gaillimh) part of the province of Connacht, located on the west coast of the Island, where they held a family seat from very ancient times. The Holleran variant is typical to Counties Galway and Mayo. 3

"This family were, as the name implies, 'importers' of Wine; and were lords of Clan Fergail, a district in which Galway town is situate; and had their castle at Barns, close to the sea-side, about three miles west of Galway. The MS. Vol. H. 2.17, in the Library of Trinity College, Dublin, states that 'O'Halloran is the chief of twenty-four townlands on Clan Fergail; and of theses are the O'Antuiles and O'Fergus of Roscam.' That statement refers to the twelve century. These twenty-four townlands of Clan Fergail lay east of the river Gallimh (or 'Galway.') In the 13th century the O'Hallorans were dispossessed of their ancient inheritance of Clan Fergail by the De Burgos [(Burke)] invaders. The O'Hallorans and the O'Flahertys, [moved] to Iar (or West) Connaught, where they built the castle of O'Hery in Gnomore; and according to tradition, the castle or Rinville in Northern Connenara. According to the Chronicles of the Wars of Thomond, at A.D. 1309, there was another family of the O'Hallorans in Thomond, descended from the stock of the O'Briens and other Dalcassians in Munster." 2

Early History of the O'Haleran family

This web page shows only a small excerpt of our O'Haleran research. Another 69 words (5 lines of text) are included under the topic Early O'Haleran History in all our PDF Extended History products and printed products wherever possible.

O'Haleran Spelling Variations

The recording of names in Ireland in the Middle Ages was an inconsistent endeavor at best due to competing dialects and languages, and the general illiteracy of the population. Research into the name O'Haleran revealed many spelling variations, including Halloran, O'Halloran, Haloran and others.

Early Notables of the O'Haleran family

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

Migration of the O'Haleran family

Irish emigration to North America began modestly in the late 18th century. At this time, Irish families made the journey to British North America and the United States by choice and after careful consideration: they were primarily in search of a suitably large stretch of land to call their own. This pattern would change most dramatically during the Great Potato Famine of the late 1840s. For example, the years 1825-1845 saw approximately 450,000 heading to British North America and 400,000 to the United States, but in 1847, at the height of the famine, it is estimated that more than 104,000 Irish immigrants went to British North America and more than 119,000 to the United States. An examination of passenger and immigration lists has revealed many early immigrants bearing the name O'Haleran: Biddy, Ellen, Lawrence, Martin, Mathew and Michael Halloran all arrived in Canada in 1847; William O'Halloran arrived in Quebec in 1825; John, James, and Michael O'Halloran arrived in Philadelphia in 1876..



  1. MacLysaght, Edward, Irish Families Their Names, Arms and Origins 4th Edition. Dublin: Irish Academic, 1982. Print. (ISBN 0-7165-2364-7)
  2. O'Hart, John, Irish Pedigrees 5th Edition in 2 Volumes. Baltimore: Genealogical Publishing Company, 1976. Print. (ISBN 0-8063-0737-4)
  3. MacLysaght, Edward, The Surnames of Ireland. Ireland: Irish Academic Press, sixth edition, 1985. Print. (ISBN 0-7165-2366-3)


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