O'Keilly History, Family Crest & Coats of Arms
- Origins Available:
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'Keilly is O Cadhla, which is derived from the word "cadhla," which means "graceful." 
Early Origins of the O'Keilly family
The surname O'Keilly 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. 
"Kiely belongs mainly to Cos. Waterford and Limerick." 
Early History of the O'Keilly family
This web page shows only a small excerpt of our O'Keilly research. Another 152 words (11 lines of text) covering the years 1190, 1630, 1645, 1689 and 1863 are included under the topic Early O'Keilly History in all our PDF Extended History products and printed products wherever possible.
O'Keilly Spelling Variations
Irish names recorded during the Middle Ages are characterized by many spelling variations. This preponderance of variations for common names can be explained by the fact that the scribes and church officials that kept records during that period individually decided how to capture one's name. These recorders primarily based their decisions on how the name was pronounced or what it meant. Research into the name O'Keilly revealed many 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'Keilly family (pre 1700)
More information is included under the topic Early O'Keilly Notables in all our PDF Extended History products and printed products wherever possible.
Migration of the O'Keilly family
Suffering from poverty and racial discrimination, thousands of Irish families left the island in the 19th century for North America aboard cramped passenger ships. The early migrants became settlers of small tracts of land, and those that came later were often employed in the new cities or transitional work camps. The largest influx of Irish settlers occurred with Great Potato Famine during the late 1840s. Although the immigrants from this period were often maligned when they arrived in the United States, they provided the cheap labor that was necessary for the development of that country as an industrial power. Early immigration and passenger lists have revealed many immigrants bearing the name O'Keilly: 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)