Show ContentsMacElroy History, Family Crest & Coats of Arms

The name MacElroy has seen many modifications since the time in which it was first devised. In Gaelic it appeared as Mac Giolla Rua, which means son of the red-haired youth.

Early Origins of the MacElroy family

The surname MacElroy was first found in County Clare (Irish: An Clár) located on the west coast of Ireland in the province of Munster, where they were the Chiefs of Clonderlaw, conjecturally descended from Tiobraid, son of Iral Glunmhar, King of Ulster. 1

Early History of the MacElroy family

This web page shows only a small excerpt of our MacElroy research. Another 148 words (11 lines of text) covering the years 1376, 1638 and 1640 are included under the topic Early MacElroy History in all our PDF Extended History products and printed products wherever possible.

MacElroy Spelling Variations

Numerous spelling variations were revealed in the search for the origin of the name MacElroy family name. Before widespread literacy, a person entrusted the proper documentation of his name to the individual scribe. As a result, a name was often recorded under several different variations during the life of its bearer. Variations found include Gilroy, Kilroy, MacGilroy, MacElroy, MacGreevy, Greevy, MacGilrea, McGilroy, McElroy, McGreevy, McGilrea, MacIlrea, McIlrea, Magilroy, Magilrea, MacElry, McElry, MacIlree and many more.

Early Notables of the MacElroy family

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


United States MacElroy migration to the United States +

Often leaving from racial discrimination and colonial oppression, thousands of families left Ireland in the 19th century for North America aboard passenger ships. Many early immigrants found a plot of land to call their own, something unimaginable for most Irish families. Those that arrived later were often accommodated as laborers since there was a large demand for cheap labor. This was the fate for many of the families that arrived in North America during the Great Potato Famine of the late 1840s. Whether they became agrarian settlers or industrial workers, the Irish that came to North America were invaluable for rapid development of the infant nations of the United States and Canada. Early North American immigration records have revealed a number of people bearing the Irish name MacElroy or a variant listed above:

MacElroy Settlers in United States in the 18th Century
  • John MacElroy, who landed in Pennsylvania in 1798
MacElroy Settlers in United States in the 19th Century
  • Arch MacElroy, who arrived in Philadelphia, Pennsylvania in 1811 2


  1. O'Hart, John, Irish Pedigrees 5th Edition in 2 Volumes. Baltimore: Genealogical Publishing Company, 1976. Print. (ISBN 0-8063-0737-4)
  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)


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