History of the Irish surname O'HaraVariants: Ó hEaghraHailing from County Sligo, O’Hara’s are descendants of Eaghra, once Lord of Luighne (an ancient territory in the province of Connacht) and a member of the household of Ollum, King of Munster. Read more Irish origins of the surname CampbellFamous O'Hara's through historyOf famous O’Haras throughout history, there have been a number of Bishops, including Bishop William O’Hara, first bishop of Scranton, Pennsylvania after whom there is a school named and John Francis O’Hara, Archbishop of Philadelphia who was named Cardinal by Pope John XXIII. Screen icon Maureen O’Hara, star of The Hunchback of Notre Dame, Miracle on 34th Street and classic The Quiet Man, was born Maureen Fitzsimons in Dublin. The Maureen O’Hara Foundation Museum is in Glengarriff, Co Cork not far from where the actress lived in the latter part of her life. Perhaps the most famous O’Hara of all, however, is the fictional character of Scarlett O’Hara, played by Vivien Leigh in the Hollywood epic, Gone with Wind, based on the book by Irish American Margaret Mitchell.