The O'Reilly family is a prominent Irish family known for their historical significance and contributions to various fields. The name "O'Reilly" originates from the Gaelic "Ó Raghallaigh," meaning "descendant of Raghallach." The family has roots in County Cavan, Ireland, and has produced notable figures in politics, literature, and business. In modern times, the O'Reilly family is also associated with O'Reilly Media, a well-known publishing company that focuses on technology and computer-related topics. Founded by Tim O'Reilly, the company has played a significant role in the development of open-source software and the tech community.