Translation according to P. W. Joyce:
Corillaun in Galway; Crane-island: see Corr, vol. i. p. 487 [reproduced below].
The crane. Corr means any bird of the crane kind, the different species being distinguished by qualifying terms. Standing alone, however, it is always understood to mean a heron - generally called a crane in Ireland; and it is used very extensively in forming names, especially in marshy or lake districts, commonly in the forms cor, gor, and gore. Loughanagore near Kilbeggan in Westmeath, in Irish Lochan-na-gcorr, signifies the little lake of the cranes; the same as Corlough, the name of several lakes and townlands in in different counties. Edenagor in Donegal, Annagor in Meath, and Monagor in Monaghan, signify respectively the hill-brow, the ford, and the bog, of the cranes; and the little ros or peninsula that juts into Lough Erne at its western extremity, must have been a favourite haunt of these birds, since it got the name of Rosscor.