Ó Ceallaigh is an Irish surname that translates to "descendant of Ceallach," with Ceallach meaning "bright-headed" or "warrior." It is associated with several families in Ireland, particularly in County Galway and County Kerry. The name reflects a rich heritage and is part of the broader Gaelic tradition of surnames. The Ó Ceallaigh family has historical significance, often linked to the O'Neill dynasty and other notable Gaelic clans. Many individuals with this surname have contributed to Irish culture, politics, and history, maintaining the legacy of their ancestors through various achievements in modern times.