Riley 2 is a variant spelling of the Irish surname Reilly, which itself is an Anglicized form of the Gaelic Ó Raghailligh, meaning 'descendant of Raghailleach.' The personal name Raghailleach has an uncertain etymology, though it is believed to denote a 'valiant' or 'noble' figure in early Irish history.Etymology and OriginThe surname originates from the ancient Irish kingdom of Breffny, located in present-day counties Cavan and Leitrim. The Ó Raghailligh clan was a prominent sept of the Uí Briúin dynasty, known for their power during the medieval period. The variant spelling Riley 2 emerged during the extensive Anglicization of Irish surnames in the 19th century. The standard forms Reilly and O'Reilly are more common, but Riley 2 represents a different phonetic approximation of the original Gaelic, potentially influenced by English-influenced diaspora spelling.Geographic DistributionAccording to Forebears, Riley 2 is present in the United States, but with limited frequency relative to the more widespread Reilly and O'Reilly variants. This concentration aligns with Irish immigration patterns to North America during the Great Famine era.Meaning: Descendant of Raghailleach (valiant/noble)Origin: Irish (County Cavan/Leitrim)Type: SurnameUsage Regions: Ireland, Irish diaspora (U.S., U.K., Canada, Australia)