There are
116
Oreilleys in the USA
Oreilley is the
143149th
most common last name in the USA

Historical figures and celebrities called Oreilley

JohnO'Reilly

John O'Reilly was a renowned Irish novelist and poet, best known for his contributions to Irish literature during the late 19th and early 20th centuries.

MaryO'Reilly

Mary O'Reilly was a prominent Irish suffragette and women's rights advocate, who played a pivotal role in the fight for gender equality and voting rights in Ireland.

PatrickO'Reilley

Patrick O'Reilley was a notable Irish politician and statesman, recognized for his dedicated service to the Irish government and his contributions to national development.

BridgetO'Reilly

Bridget O'Reilly was a trailblazing Irish scientist, known for her groundbreaking research in the field of biochemistry and her significant contributions to medical science.

MichaelO'Reilley

Michael O'Reilley was a prominent Irish-American entrepreneur and philanthropist, who made significant contributions to the business community and charitable causes.

Oreilley Genealogy

OriginsThe origins of the O'Reilley surname can be traced back to ancient Ireland, with the name being associated with the O'Reilly clan who were prominent in County Cavan. Today, individuals with this surname can be found in various parts of the world, particularly in Ireland and countries with significant Irish diaspora.
Geographic DistributionThe O'Reilley surname is most popular in Ireland, where it has a significant presence. It is also found in the United States, Canada, Australia, and the United Kingdom, among other countries with Irish communities.
VariationsVariations of the O'Reilley surname include O'Riley, Reilly, Riley, and Reilley.
Migration and ImmigrationThe O'Reilley family has a history of migration and immigration, with many individuals leaving Ireland during periods of economic hardship, such as the Great Famine in the mid-19th century. They sought better opportunities in countries like the United States, Canada, and Australia.