Translation according to P. W. Joyce:
Coolsrahra in Galway — better Coolsruhra ; Cúl-sruthra, hill-back of the sruthair or stream. See Sruthair in vol. i. p. 457.
Sruthair [sruhar], a derivative from sruth, is in still more general use, and signifies also a stream it undergoes various modern modifications, of which the commonest is the change of the final r to l (see p. 48). Abbeyshrule in Longford was anciently called Sruthair, i.e. the stream, and it took its present name from a monastery founded there by one of the O'Farrells. Abbeystrowry in Cork is the same name, and it was so called from the stream that also gives name to Bealnashrura (ford-mouth of the stream), a village situated at an ancient ford. Struell near Downpatrick is written Strohill in the Taxation of 1306, showing that the change from r to l took place before that early period; but the r is retained in a grant of about the year of 1178, in which the place is called Tirestruther, the land of the streamlet. The celebrated wells of St. Patrick are situated here, which in former times were frequented by persons from all quarters; and the stream flowing from them must have given the place its name (see Reeves's Eccl. Ant., pp. 42, 43). The change of r to l appears also in Sroolane and Sroleen, which are often applied to little streams in the south, and which are the names of some townlands.