It might be worth clarifying that the Irish name listed here Log na hEala is unlikely to refer to the summit area but rather to the valley to the NE, that above 'Glendoo House'. The name Lognahala appears written slantwise along this valley feature on Nevill's map of Wicklow, 1760.
Also on this map, Glenduff (dark glen) is written along the valley of Glendoo. The word Bog Mtns appears up near the tops and what looks like G.dow. Finally of interest, is that a hill labelled Knockbrack, as far as I can read, sits where what is now called Tibradden Mtn. So there's Ballybrack which is known now below and Knockbrack. Linkback: https://mountainviews.ie/summit/303/comment/6157/