Show ContentsOreily History, Family Crest & Coats of Arms

The Oreily surname originally appeared in Gaelic as Ó Raghailligh, which means descendant of Raghallach.

Early Origins of the Oreily family

The surname Oreily 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 Oreily family

This web page shows only a small excerpt of our Oreily 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 Oreily History in all our PDF Extended History products and printed products wherever possible.

Oreily Spelling Variations

Pronunciation, rather than spelling, guided scribes and church officials when recording names during the Middle Ages. This practice often resulted in one person's name being recorded under several different spellings. Numerous spelling variations of the surname Oreily are preserved in these old documents. The various spellings of the name 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 Oreily family

Notable amongst the family name at this time was Count John O'Reilly; Edmund O'Reilly (1598-1669), Roman Catholic Archbishop of Armagh; Hugh Reily (Reilly or O’Reilly) (c.1630-1695) Irish Member of Parliament for Cavan Borough in the Patriot Parliament of 1689; Philip Og O’Reilly (Gaelic was Phillip Óg O’Raghallaigh)(c.1640-1703), Irish...
Another 48 words (3 lines of text) are included under the topic Early Oreily Notables in all our PDF Extended History products and printed products wherever possible.


New Zealand Oreily migration to New Zealand +

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:

Oreily Settlers in New Zealand in the 19th Century
  • Bridget O'Reily, aged 23, a servant, who arrived in Auckland, New Zealand aboard the ship "Salisbury" in 1876
  • Cornelius O'Reily, aged 40, a staymaker, who arrived in Wellington, New Zealand aboard the ship "Rakaia" in 1878
  • Mary O'Reily, aged 31, who arrived in Wellington, New Zealand aboard the ship "Rakaia" in 1878
  • Margaret O'Reily, aged 2, who arrived in Wellington, New Zealand aboard the ship "Rakaia" in 1878


Houseofnames.com on Facebook