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![Show Contents]() O'Derry History, Family Crest & Coats of Arms
- Origins Available:
 Ireland
There are a multitude of ancient meanings and variations associated with the Irish surnames that are now common throughout the modern world. The original Gaelic form of the name O'Derry is Ó Cadhla, which is derived from the word "cadhla," which means "graceful." 1 Early Origins of the O'Derry familyThe surname O'Derry was first found in County Waterford (Irish: Port Láirge), anciently the Deise region, on the South coast of Ireland in the Province of Munster, where they held a family seat from very ancient times. They are of the ancient kingdom of Ossory (Osraighe), conjecturally descended from the Kings and gentry of Ossory, the progenitor of which was Conla, the second son of Breasal Breac, King of Leinster, and descended to Ceallach who was ancestor of Teige McGillpatrick. 2 "Kiely belongs mainly to Cos. Waterford and Limerick." 3 Early History of the O'Derry familyThis web page shows only a small excerpt of our O'Derry research. Another 152 words (11 lines of text) covering the years 1190, 1630, 1645, 1689 and 1863 are included under the topic Early O'Derry History in all our PDF Extended History products and printed products wherever possible. O'Derry Spelling VariationsThe recording of names in Ireland in the Middle Ages was an inconsistent endeavor at best. One must realize that attempting to record a Gaelic name in English is a daunting task at the best of times. Even today the translation is a difficult one. Accordingly, research into the name O'Derry revealed spelling variations, including Keily, Keiley, Keilly, Kiley, Kily, Kiely, Kieley, Keeley, Keely, Queally, Quealy, Quelly, O'Keily, O'Keilly, O'Kiely and many more. Early Notables of the O'Derry familyMore information is included under the topic Early O'Derry Notables in all our PDF Extended History products and printed products wherever possible. Migration of the O'Derry familyIrish families fled the English-colonized Ireland in record numbers during the 19th century for North America. Many of those destitute families died from disease during, and even shortly after, the long journey. Although those that immigrated before the Great Potato Famine of the 1840s often were granted a tract of land, those that arrived later were generally accommodated in urban centers or in work camps. Those in the urban centers would labor in the manufacturing sector, whereas those in work camps would to build critical infrastructures such as bridges, canals, roads, and railways. Regardless of when these Irish immigrants came to North America, they were critical for the rapid development of the young nations of the United States and Canada. Early immigration and passenger lists have recorded many early immigrants bearing the name of O'Derry: William Keeley who landed in America in 1765; Dennis and Ellen Keeley settled in Boston Massachusetts in 1849; Michael Keeley settled in Philadelphia, Pennsylvania in 1852.
- Smith, Eldson Coles, New Dictionary of American Family Names New York: Harper & Row, 1956. Print
- O'Hart, John, Irish Pedigrees 5th Edition in 2 Volumes. Baltimore: Genealogical Publishing Company, 1976. Print. (ISBN 0-8063-0737-4)
- MacLysaght, Edward, More Irish Families. Dublin: Irish Academic Press, 1982. Print. (ISBN 0-7165-0126-0)
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