The Leabhar Branach (Irish pronunciation: [ˌl̠ʲəuɾˠ ˈbˠɾˠan̪ˠəx]), also called the (Poem) Book of the O'Byrnes is an Early Modern Irish anthology of poetry collected in the early 17th century. It consists of poetry in praise of the O'Byrne family, who ruled a region known as Gabhal Raghnaill in modern County Wicklow. The poems were written between roughly 1550 and 1630, a time of turmoil in Ireland that saw the Desmond Rebellions, Nine Years' War and O'Doherty's rebellion.