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Oconor History, Family Crest & Coats of Arms



Today's Irish surnames are underpinned by a multitude of rich histories. The name Oconor originally appeared in Gaelic as O Conchobhair, derived from the personal name Conchobhar.

Early Origins of the Oconor family


The surname Oconor was first found in Connacht. There were six different septs of this famous name scattered throughout Ireland, of which four continue to boast many members. However, the most important O'Connors were those of Connacht, divided into three main branches: O'Conor Don; O'Conor Roe; and O'Conor Sligo. The Connacht O'Connors were direct descendants of Conchobhar, King of Connacht, who died in 971 AD. Furthermore, this family produced the last two High Kings of Ireland: Turlough O'Connor (1088-1156) and Roderick O'Connor (1116-1196). It was the invasion of Leinster by Roderick O'Conner on behalf of the Prince of West Brefney that caused the King of Leinster, Dermod MacMorough, to flee to England for aid. This resulted in the Strongbow Invasion of 1168, the beginning of English domination over Ireland. Despite remaining stubbornly Catholic, the O'Connor family continued to maintain their elite position among the Irish nobility throughout the entire period of British dominance.

Early History of the Oconor family


This web page shows only a small excerpt of our Oconor research.
Another 363 words (26 lines of text) covering the years 1002, 1641, 1652, 1710, 1791, 1838, 1906, 1763 and 1852 are included under the topic Early Oconor History in all our PDF Extended History products and printed products wherever possible.

Oconor Spelling Variations


Irish names were rarely spelled consistently in the Middle Ages. Spelling variations of the name Oconor dating from that time include Connor, Conner, Conor, Connors, O'Connor, Connores, Conner, Connar, Connars, O'Connar, O'Conner, Connair, Connairs, Connaire, Connaires, Cawner, Cawners, Caunnor, Cauner, Cauners and many more.

Early Notables of the Oconor family (pre 1700)


Notable amongst the family name at this time was Cabrach O'Conor and Hugh O'Connor, son and grandson of O'Conor Don, took a prominent part in the 1641-1652 wars; Turlough O'Connor of Connacht, High...
Another 32 words (2 lines of text) are included under the topic Early Oconor Notables in all our PDF Extended History products and printed products wherever possible.

Migration of the Oconor family to the New World and Oceana


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 Oconor: William Conner who settled in Plymouth, arriving on the "Fortune" in 1621; just a year after the "Mayflower," Cornelious Conner, who settled in Exeter in 1650.

Contemporary Notables of the name Oconor (post 1700)


  • Charles O'Conor (1804-1884), American lawyer and politician, a candidate in the 1872 U.S. presidential election
  • Herbert Romulus O'Conor (1896-1960), American Democrat politician, the 51st Governor of Maryland (1939-1947)
  • Charles O'Conor (1764-1828), Irish priest and historical author
  • Eugene Joseph O'Conor (1835-1912), Irish-born, New Zealand Member of Parliament
  • Denis Maurice O'Conor (1840-1883), Irish politician, Member of Parliament, High Sheriff of Roscommon in 1865
  • Matthew O'Conor (1773-1844), Don of Ballinagare, County Roscommon, Irish historian, the O'Conor Don and de jure King of Connacht
  • Denis O'Conor (1794-1847), the O'Conor Don, Irish nobleman and politician, Member of Parliament for Roscommon (1831-1847), Junior Lord of the Treasury (1846-1847)
  • Charles Owen O'Conor PC (1838-1906), the O'Conor Don, Irish Member of Parliament for Roscommon (1860–1880), Lord Lieutenant of Roscommon (1896–1906)
  • Roderic O'Conor (1860-1940), Irish painter and etcher from Milltown, Castleplunket, County Roscommon
  • John O'Conor (b. 1947), Irish pianist and pedagogue, former director of the Royal Irish Academy of Music, recipient of an Honorary Fellowship by the Royal Irish Academy of Music
  • ... (Another 4 notables are available in all our PDF Extended History products and printed products wherever possible.)

The Oconor Motto


The motto was originally a war cry or slogan. Mottoes first began to be shown with arms in the 14th and 15th centuries, but were not in general use until the 17th century. Thus the oldest coats of arms generally do not include a motto. Mottoes seldom form part of the grant of arms: Under most heraldic authorities, a motto is an optional component of the coat of arms, and can be added to or changed at will; many families have chosen not to display a motto.

Motto: O Dhia gach an cabhair
Motto Translation: From God Every Help


Oconor Family Crest Products



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