O'Reilly History, Family Crest & Coats of ArmsThe O'Reilly surname originally appeared in Gaelic as Ó Raghailligh, which means descendant of Raghallach. Early Origins of the O'Reilly familyThe surname O'Reilly was first found in County Cavan. They were known as the Princes of East Breffny, descended from Raghallaigh, Prince of Breffny in 981. They maintained their territory during the Anglo/Norman invasion of Strongbow, Earl of Pembroke, in 1172, but Sir John O'Reilly, Prince of Breffny surrendered the principality to Queen Elizabeth I thereby ensuring that his territories remained intact. Early History of the O'Reilly familyThis web page shows only a small excerpt of our O'Reilly research. Another 95 words (7 lines of text) covering the years 1598, 1630, 1640, 1646, 1667, 1669, 1689, 1691, 1695 and 1703 are included under the topic Early O'Reilly History in all our PDF Extended History products and printed products wherever possible. O'Reilly Spelling VariationsMany spelling variations of the surname O'Reilly can be found in the archives. One reason for these variations is that ancient scribes and church officials recorded names as they were pronounced, often resulting in a single person being recorded under several different spellings. The different spellings that were found include O'Reilly, O'Reilley, O'Reily, O'Rielly, O'Riely, O'Riley, O'Rilley, Reel and many more. Early Notables of the O'Reilly familyNotable amongst the family name at this time was
O'Reilly World RankingIn the United States, the name O'Reilly is the 3,584th most popular surname with an estimated 7,461 people with that name. 1 However, in Australia, the name O'Reilly is ranked the 664th most popular surname with an estimated 5,882 people with that name. 2 And in New Zealand, the name O'Reilly is the 867th popular surname with an estimated 845 people with that name. 3 The United Kingdom ranks O'Reilly as 905th with 7,573 people. 4
In the 19th century, thousands of Irish left their English-occupied homeland for North America. Like most new world settlers, the Irish initially settled on the eastern shores of the continent but began to move westward with the promise of owning land. The height of this Irish migration came during the Great Potato Famine of the late 1840s. With apparently nothing to lose, Irish people left on ships bound for North America and Australia. Unfortunately a great many of these passengers lost their lives - the only thing many had left - to disease, starvation, and accidents during the long and dangerous journey. Those who did safely arrive in "the land of opportunities" were often used for the hard labor of building railroads, coal mines, bridges, and canals. The Irish were critical to the quick development of the infrastructure of the United States and Canada. Passenger and immigration lists indicate that members of the O'Reilly family came to North America quite early: O'Reilly Settlers in United States in the 19th Century
O'Reilly Settlers in United States in the 20th Century
Some of the first settlers of this family name were: O'Reilly Settlers in Canada in the 19th Century
Emigration to Australia followed the First Fleets of convicts, tradespeople and early settlers. Early immigrants include: O'Reilly Settlers in Australia in the 19th Century
Emigration to New Zealand followed in the footsteps of the European explorers, such as Captain Cook (1769-70): first came sealers, whalers, missionaries, and traders. By 1838, the British New Zealand Company had begun buying land from the Maori tribes, and selling it to settlers, and, after the Treaty of Waitangi in 1840, many British families set out on the arduous six month journey from Britain to Aotearoa to start a new life. Early immigrants include: O'Reilly Settlers in New Zealand in the 19th Century
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