The Éoganachta were a significant dynasty in early medieval Ireland, primarily associated with the province of Munster. They claimed descent from Eógan, a legendary figure, and played a crucial role in the political landscape of the time. The dynasty produced several notable kings, including Brian Boru, who became one of Ireland's most famous rulers. The Éoganachta were known for their influence over the Church and their patronage of monasteries, which helped spread Christianity throughout the region. Their power peaked during the 9th and 10th centuries, but they eventually faced challenges from rival dynasties, leading to their decline in prominence.