Other Forms of the Name with authority source (if provided) in italics:
Green Island
Oilean Glas
Green Island
Green Island B. S. Sketch
Green Island Counsellor Reid
Green Island John Burke, Esq.
Green Island Mr. Mulloy
Green Island Rev. H. B. Hulett
Description:
A small island so called from its green appearance in summer. It is covered in winter by the floods.
Situation:
In Lough Derg about ¼ of a mile N. E. of Illaanmore and about 2¾ of mile N. E. of Williamstown Quay.