O'Kavanaugh History, Family Crest & Coats of Arms
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Irish names tend to vary widely in their spelling and overall form. The original Gaelic form of the name O'Kavanaugh is Caomhanach, an adjective denoting association with St. Caomhan. The first Kavanagh, Donal, the son of Dermot MacMurrough, was fostered by a successor of this saint.
Early Origins of the O'Kavanaugh family
The surname O'Kavanaugh was first found in County Carlow (Irish: Cheatharlach) a small landlocked area located in the province of Leinster in the South East of Ireland, where they held a family seat from very ancient times. The Kavanaghs (Cavanaghs) were descended from the MacMorough stem and were Lords of Leinster. Donoch McMorough was the King of Leinster, son of Dermod and it was from Donoch from which the Cavanaghs sprang. They were descended directly from the Heremon Line of Irish Kings. Donell, son of Dermot MacMurrough acquired the name Caomhanach, or Cavanagh. His sister Eva married Strongbow, Earl of Pembroke, the leader of the English invasion of Ireland. 
Early History of the O'Kavanaugh family
This web page shows only a small excerpt of our O'Kavanaugh research. Another 96 words (7 lines of text) covering the years 1889, 1554, 1538, 1540, 1541, 1543, 1667 and 1739 are included under the topic Early O'Kavanaugh History in all our PDF Extended History products and printed products wherever possible.
O'Kavanaugh Spelling Variations
Irish names were rarely spelled consistently in the Middle Ages. Spelling variations of the name O'Kavanaugh dating from that time include Cavanagh, Kavanagh, Kavanah, Cavanaugh, Keevan, Cavanaw, Kavanaw, Cavenaugh, Cavanough, Cavaneagh, Cavana, Cavena, Cavinaugh, Kavina, Kavena, Kavanaugh, Cavanach, Kavanach, Cabenagh, O'Cavanagh, O'Kavanagh, Keaveney, Geaveney, M'Cavanna and many more.
Early Notables of the O'Kavanaugh family (pre 1700)
Prominent amongst the family at this time was Cahir Mac Art Kavanagh, Lord of St. Molyns, Baron of Ballyann (d. 1554), the eldest son of Art Kavanagh of St. Molyns (Teach Molyns), and Chief of his Sept. He took part in the rebellion of the Leinster Geraldines, but submitted to Lord Leonard Grey in 1538. "He renewed his submission to Sir Anthony St. Leger in November 1540, and preferred a request to be allowed to hold his land in feudal tenure. He was anxious, he declared, to imitate his ancestor, Dermot Mac Murrough, king of Leinster, who had introduced the English...
Another 141 words (10 lines of text) are included under the topic Early O'Kavanaugh Notables in all our PDF Extended History products and printed products wherever possible.
Migration of the O'Kavanaugh family
Thousands of Irish families left for North American shores in the 19th century. These people were searching for a life unencumbered with poverty, hunger, and racial discrimination. Many arrived to eventually find such conditions, but many others simply did not arrive: victims of the diseased, overcrowded ships in which they traveled to the New World. Those who lived to see North American shores were instrumental in the development of the growing nations of Canada and the United States. A thorough examination of passenger and immigration lists has disclosed evidence of many early immigrants of the name O'Kavanaugh: Charles, Dudley, James, John, Joseph, Michael, Nicholas, Peter, Robert, Thomas and William Cavanagh, who all arrived in Philadelphia, Pennsylvania between 1813 and 1880.
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- ^ Lower, Mark Anthony, Patronymica Britannica, A Dictionary of Family Names of the United Kingdom. London: John Russel Smith, 1860. Print.