Leitir Móir (Gaeilge)
meaning of Irish place name:
mór– great, big
leitir (also: leitreach)- hillside
Gazetteer of Ireland, Vol. II, 1843-44, p. 663.
LETTERMORE, an island in the parish of Killannin, barony of Moycullen, co. Galway, Connaught. It screen much of the south side of Kilkerran bay,- or, in a sense, lies in the mouth of that bay; and is separated by narrow sounds from Innisbtravin on the north, Annaghvaan on the north-east, the main-land on the east, Garomna on the south, Innisbarra on the south-west, and Innisghaun on the west. Its length westward, is 3 ¼ miles; its extreme breadth is 2; and its highest ground has an altitude above sea-level of 388 feet. On its south coast is a coast-guard station.