... In Chaldee, BTR signifies After, and in the Arabic BAD means "After, Afterwards," says Mr. Richardson.  The origin, from which this Arabic word is derived, will be manifest from the next term in Mr. Richardson's Dictionary, under the same form BAID, BAAD, BUAD, &c. signifying "Little, mean, Vile.  Any thing in which there is little Good;" which brings us directly to BASE and BAD.  The term likewise means "Perishing, Death," which brings us to the Celtic BATH, and BAS.  The succeeding term is BADan, Afterwards, BUDAN leka, Evil be to thee... (Etymologicon Universale, Whiter, v.2, 1825).

    Cathbath, the Druid of Conchobar's court; he prophesied of Deirdre at her birth, and weakened the children of Usnech by his spells.  According to the earliest accounts, he was the real father of Conchobar.  His son Geanain was also a Druid.  The character of the Gaelic Druids may be inferred to some extent from their miracles, which may be described "as mostly atmospheric, consisting in such feats as bringing on a heavy snow, palpable darkness, or a great storm, such as the ones by means of which a Druid tried to effect the shipwreck of St. Columba on Loch Ness."—"Hib. Lect.," p. 224. (Fled Bricrend: the Feast of Bricriu, Henderson, 1899).