Translation according to P. W. Joyce:
Knockavanny in Galway, and Knockavannia in Waterford ; Cnoc-a-bhainne, hill of the milk : indicating good pasture. See Bainne, vol. ii. p. 206 [reproduced below].
New milk is denoted by leamhnacht [lewnaght]; but the old form, as we find it in Cormac's Glossary, is lemlacht, the l being changed to n (see First Vol. Part I., c. iii.) in modern Irish. In its simple form it gives name to two townlands called Lennaght, one in Monaghan and the other in Kilkenny; while the diminutive Loonaghtan is the name of a place near Ahascragh in Galway, signifying new milk land (see p. 19). There is a townland giving name to a parish near Clonmel, called Inishlounaght, the river-holm of new milk, where O'Faelan, prince of the northern Decies, had his stronghold; and where O'Brien, king of Limerick, and O'Faelan founded an abbey in 1187. The Irish form of the name as given by Keating, is Inis-leamhnachta, the river-holm of the new milk; and the place obviously got this name from the beautiful inch along the Suir, between Clonmel and Marlfield. The word occurs in many other names such as Drumlaunaght in Cavan (Drum, a long hill), Fahanlunaghta near Ennistimon in Clare, and Gortlaunaght in Cavan, both signifying the field (faitche and gort) of the new milk. Near the western shore of Lough Derg, in the parish of Clonrush in Galway, there is a small lake called Lough Alewnaghta, new milk lake, which may have been so called from the softness of its water. Keating accounts for a name of this kind by a legend about one of those medicinal baths spoken of at page 76. During the short time that the Picts resided in Ireland, before their migration to Scotland, many centuries before the Christian era, Criffan, the king of Leinster, and his subjects were sorely annoyed by a hostile people in his neighbourhood, who used poisoned weapons, so that whoever received a wound from them, no matter how trifling, was sure to die of it. The king at last consulted a learned Pictish druid named Trosdan, who told him to have a bath prepared on the occasion of the next battle, with the milk of 150 white hornless cows, in which each wounded man was to be bathed. Criffan, as soon as he had procured the cows, at once sent a challenge to his adversaries; and on the eve of the battle he had the bath prepared just as the druid directed. As fast as the king's men were wounded they were plunged into the bath, from which they came out as well as ever; so that the Leinster army routed their foes with dreadful slaughter. From this event the place came to be called Ardlemnachta, the height of the new milk. Sometimes other words for milk are found in names. Thus the name of Blittog in the parish of Donaghmoyne in Monaghan, is a diminutive on bliocht or bleacht, milk: - Bliochtóg, milk-land; meaning, I suppose, good milk-pasture.