Map of Ireland with tribes, AD 800; the Delbhna are circled.
The Delbna or Delbhna were a GaelicIrish tribe in Ireland, claiming kinship with the Dál gCais, through descent from Dealbhna son of Cas. Originally one large population, they had a number of branches in Connacht, Meath, and Munster in Ireland.[1]