Show ContentsO'Connilys History, Family Crest & Coats of Arms

While many Irish names are familiar, their past incarnations are often shrouded in mystery, reflecting the ancient Gaelic heritage of their bearers. The original Gaelic form of the name O'Connilys is Ó Conghalaigh, Ó Conghaile, or Ó Coingheallaigh. 1

Early Origins of the O'Connilys family

The surname O'Connilys was first found in Connacht and Munster, as well as County Monaghan and Leinster. There were three Gaelic septs whose name was Anglicized as Connolly: the O Conghalaigh sept (also known as O Conghaile) who lived in Connacht and the adjacent County Monaghan; the O Coingheallaigh sept, which also used the alias Mac Coingheallaigh, were subordinate to the powerful O'Donovans and dwelled in West Cork in Munster; and another sept, related to the O'Maddens, resided in Connacht and were of the Ui Maine. 2

Early History of the O'Connilys family

This web page shows only a small excerpt of our O'Connilys research. Another 115 words (8 lines of text) covering the years 1014, 1591, 1660, 1715, 1729, 1738, 1750, 1760, 1803 and 1825 are included under the topic Early O'Connilys History in all our PDF Extended History products and printed products wherever possible.

O'Connilys Spelling Variations

During the Middle Ages, scribes listened to a person's name and then decided the spelling from there. Names, therefore, often had many spelling variations. The variations of the name O'Connilys include: Connolly, Conolly, Connally, O'Connolly, Connolley, Conally, Connelly, Conoley, Connaleigh, Connelay, Conley, Conlay, Conlaye and many more.

Early Notables of the O'Connilys family

Notable amongst the family name at this time was William Connolly (c.1660-1729), Speaker of the House of Commons. He was the son of a publican, or, as some say, of a blacksmith. Having been called to the bar, he soon made way in his profession; but he distinguished himself more particularly in the Irish House of Commons, of which he was chosen speaker 12 Nov. 1715. He continued to hold this post until his resignation through failure of health, 12 Oct...
Another 80 words (6 lines of text) are included under the topic Early O'Connilys Notables in all our PDF Extended History products and printed products wherever possible.

Migration of the O'Connilys family

Irish immigrants began to leave the English-controlled Ireland in sizable numbers during the late 18th century. Many of these Irish immigrated to British North America or the United States in the hopes of gaining their own tract of farmland. This pattern of migration grew steadily until the 1840s when the Great Potato Famine caused a great exodus of immigrants to North America. These immigrants differed from their predecessors in that they were desperately fleeing the disease and starvation that plagued their homeland, and many were entirely destitute when they arrived in North America. Although these penniless immigrants were not warmly welcomed when they arrived, they were critical to the rapid development of the United States and what would become known as Canada. Many went to populate the western frontiers and others provided the cheap labor the new manufacturing sector and the building of bridges, roads, railways, and canals required. A thorough examination of immigration and passenger lists has revealed some of the earliest people to arrive in North America with name O'Connilys or one of its variants: Michael and Thomas Connally who settled in Philadelphia, Pennsylvania in 1834 and 1856 respectively; M. Connolley settled in New York in 1820; John Connolly settled in Virginia in 1773.



  1. MacLysaght, Edward, Supplement to Irish Families. Baltimore: Genealogical Book Company, 1964. Print.
  2. MacLysaght, Edward, Irish Families Their Names, Arms and Origins 4th Edition. Dublin: Irish Academic, 1982. Print. (ISBN 0-7165-2364-7)


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