Show ContentsO'Fallon Surname History

The spelling and overall form of Irish names often vary considerably. The original Gaelic form of the name O'Fallon is Ó Fallamhain. 1

Early Origins of the O'Fallon family

The surname O'Fallon was first found in 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.

Early History of the O'Fallon family

This web page shows only a small excerpt of our O'Fallon research. Another 120 words (9 lines of text) covering the years 1443, 1458, 1464 and 1466 are included under the topic Early O'Fallon History in all our PDF Extended History products and printed products wherever possible.

O'Fallon Spelling Variations

The archives that survive today demonstrate the difficulty experienced by the scribes of this period in their attempts to record these names in writing. Spelling variations of the name O'Fallon dating from that time include Fallon, O'Fallon, Fallone, Falloone, Folan, Follan, Vollan and many more.

Early Notables of the O'Fallon family

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

Migration of the O'Fallon family

Thousands of Irish left in their homeland in the 18th and 19th centuries to escape the religious and political discrimination they experienced primarily at the hands of the English, and in the search of a plot of land to call their own. These immigrants arrived at the eastern shores of North America, early on settling and breaking the land, and, later, building the bridges, canals, and railroads essential to the emerging nations of United States and Canada. Many others would toil for low wages in the dangerous factories of the day. Although there had been a steady migration of Irish to North America over these years, the greatest influx of Irish immigrants came to North America during the Great Potato Famine of the late 1840s. Early North American immigration records have revealed a number of people bearing the Irish name O'Fallon or a variant listed above: Stephen Fallon lived in Pennsylvania in 1773; and many other Fallons later joined him there in the mid 1800's. The family also settled in New York, California, Massachusetts, during the 19th century. They also settled in Newfoundland between 1850 and 1871..


Contemporary Notables of the name O'Fallon (post 1700) +

  • Peter O’Fallon, American New York International Film and TV Festival Award nominated television director from Colorado, known for Mysterious Ways (2000), UnREAL (2015) and Legit (2013)
  • Benjamin O'Fallon, American Indian agent in Nebraska, namesake of O'Fallons Bluff, Lincoln County, Nebraska, known as "Father of the Tribes" for his friendly relations with the Indians
  • John O'Fallon (1791-1865), American businessman, philanthropist, and military officer, at one time the wealthiest person in St. Louis, Missouri, eponym of O'Fallon, Illinois and O'Fallon, Missouri, nephew of William Clark
  • James O'Fallon (d. 1793), American physician who served as a surgeon in Washington's army during the Revolutionary War, father of John and Benjamin O'Fallon
  • Peter O'Fallon, American director, producer and writer for commercial, television and film productions
  • The Most Reverend James O'Fallon (d. 1786), Irish Roman Catholic clergyman, Bishop of Elphin (1756–1786)


  1. MacLysaght, Edward, The Surnames of Ireland. Ireland: Irish Academic Press, sixth edition, 1985. Print. (ISBN 0-7165-2366-3)


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