FitzGeralds of Offaly refers to a prominent family in Ireland, particularly in the County Offaly region. The FitzGeralds were part of the Anglo-Norman nobility and played a significant role in the history and development of the area from the 12th century onwards. They were known for their influence in local governance and land ownership. The family is associated with several historical events and structures, including Kilbeggan Castle and Clonmacnoise, an important early Christian site. Over the centuries, the FitzGeralds contributed to the cultural and political landscape of Ireland, leaving a lasting legacy in the region.