Airbertach mac Cosse
Airbertach mac Cosse (?-1016), poet; lector and later superior of the monastery of Ros Ailithir (now Rosscarbery), on the coast of south-west Co. Cork. ‘Rofessa i curp Domuin Dúir’, a poem on the geography of the world, is ascribed to him in both the Book of Glendalough and the Book of Leinster.





