An Irish surname, the O’Connor family name comes from the Gaelic name of O’Conchobhair’ which means a descendant of Conchobhar. The earliest O’Connor families were in the Irish county of Clare.

Spelling variations for O’Connor include Connores, Conor, O’Connar, Connairs, Cawner, Caunnor, Cauner and O’Conner.

The counties of Lancashire, Yorkshire and the city of London have the greater portion of O’Connor families. In Scotland the O’Connor families are in Lanarkshire, Angus and Renfrewshire.

The O’Connor surname is very common and popular in most of Ireland.
The O’Connor family name is located in the United States in the northeastern region, mostly in New York, New Jersey, Connecticut, Maine and then in Michigan.

Famous: Bryan D. O’Connor (astronaut), Carroll O’Connor (actor), Christy O’Connor (Irish professional golfer), Danny O’Connor (professional boxer), Donald O’Connor (dancer, singer and actor), Patrick Edward O’Connor (Civil War Confederate soldier), Gavin O’Connor (screen writer, producer an film director), Sandra Day O’Connor (U. S. Supreme Court Justice), Joseph O’Connor (novelist from Ireland) and Sinead O’Connor (Irish singer and songwriter).