For centuries, the Ó Briain clan reigned over Thomond, their legacy forged in ambition, courage, and leadership. Descended from High King Brian Boru, they were warriors, statesmen, and guardians of their people, defending their lands from Norman incursions while safeguarding the traditions of Gaelic Ireland. As English power grew, the O’Briens were eventually dethroned, yet they remained steadfast in their loyalty to their people. During the Penal Laws, some turned to trade or military service. But when the Great Famine struck, most of what remained departed from Limerick, arriving in New York and Boston to begin anew. In America, the O’Brien legacy entered a bold new chapter. From influential writers like Tim O’Brien to cultural figures such as Conan O’Brien, the family rose to prominence in politics, business, and the arts, guided by vision, resolve, and a remarkable ability to thrive in changing circumstances. In this captivating volume of Kelly’s Irish Genealogy Series, Sean Kelly draws from Thomond archives, ship manifests, and private family papers to recount the extraordinary story of a family whose leadership and fortitude left an enduring mark across generations. For descendants, this book is a reminder that their heritage is not a relic but a living thread, stretching from ancient Irish kingdoms to modern-day America. The legacy that defined the O’Briens continues to live on and inspire the next generation. Discover your Irish heritage today.