Patrick Weston Joyce

Delvin. There were formerly seven tribes called Dealbh-na [Dalvana], descended and named from Lugh-aidh Dealbhaeth [Lewy Dalway], who was the son of Cas mac Tail (seventh in descent from Olioll Olum: see Connello), the ancestor of the Dalcassians of Thomond: Dealbhna, i. e. Dealbhaeth's descendants. None of these have perpetuated their name except one, viz., Dealbhna mor, or the great Dealbhna, from whom the barony of Delvin in Westmeath received its name.