Show ContentsFlanagen Surname History

The Irish name Flanagen was originally written in a Gaelic form as "O Flannagain," from the word "flann," which means "red" or "ruddy." Collectively the name means "descendants of the red-complexioned man." 1

Early Origins of the Flanagen family

The surname Flanagen was first found in County Roscommon, where they claim descent from the O'Connors as shown by the similarities of the Coat of Arms. Today the surname is more frequently found in County Roscommon, Mayo, Galway and Clare, no doubt branches from their ancestral roots. 2

Sources agree that Roscommon and the aforementioned counties on the western seaboard is where the lion's share of the family originate. However, as there are at least five distinct branches of the family: Ely O'Carroll; Connaught; Fermanagh; Orgiall; and Uactar Tire ("Upperthird", in the northwest of the county of Waterford.) "The O'Flanagans of the Upperthird were dispossessed shortly after the English [Strongbow] invasion by the family of Le Poer (now 'Power'), who still possess a large portion of that territory." 1

The O'Flanagan, of Ely O'Carroll branch claim descent from O'Flannagain Ele, a direct descendant on the O'Carroll Ely pedigree. O'Flanagan, Chiefs of Kinelargy in Ely O'Carroll similarly claim descent through the O'Carroll Ely pedigree. Note: Kinelargy is an ancient territory the corresponds with the present barony of Balllybrit, in the King's County. Both of these branches claim descent through the Heber line of Irish kings. 1

The O'Flanagans of Fermanagh claim descent through Niall of the Nine Hostages, the 126th Monarch of Ireland and the O'Flanagans of Orgiall similarly claim a similar descent. These latter two branches claim descent through the Heremon line of ancient Kings of Ireland. 1

Early History of the Flanagen family

This web page shows only a small excerpt of our Flanagen research. Another 90 words (6 lines of text) covering the years 1172 and 1308 are included under the topic Early Flanagen History in all our PDF Extended History products and printed products wherever possible.

Flanagen Spelling Variations

Within the archives researched, many different spelling variations of the surname Flanagen were found. These included One reason for the many variations is that scribes and church officials often spelled an individual's name as it sounded. This imprecise method often led to many versions. Flanagan, Flanaghan, Flanagen, Flannagan, Flannagen, Flanigan, Flannigan, Flanigen, Flannigen, Flanagin, Flannagin and many more.

Early Notables of the Flanagen family

Another 28 words (2 lines of text) are included under the topic Early Flanagen Notables in all our PDF Extended History products and printed products wherever possible.


United States Flanagen migration to the United States +

A massive amount of Ireland's native population left the island in the 19th century for North America and Australia in hopes of finding more opportunities and an escape from discrimination and oppression. A great portion of these migrants arrived on the eastern shores of the North American continent. Although they were generally poor and destitute, and, therefore, again discriminated against, these Irish people were heartily welcomed for the hard labor involved in the construction of railroads, canals, roadways, and buildings. Many others were put to work in the newly established factories or agricultural projects that were so essential to the development of what would become two of the wealthiest nations in the world. The Great Potato Famine during the late 1840s initiated the largest wave of Iris immigration. Early North American immigration and passenger lists have revealed a number of people bearing the name Flanagen or a variant listed above:

Flanagen Settlers in United States in the 19th Century
  • John and Owen Flanagen, who settled in Philadelphia in 1823


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


Houseofnames.com on Facebook