Cathbu (Cathbad), the Druid connected with Conchobar, king of Ulster, in the older cycle is accompanied by a number of youths (Ioo according to the oldest version) who are desirous of learning his art, though what this consisted in we are not told.
The Celtic heroic saga in the British islands may be divided into the two principal groups of Gaelic (Irish) and Brython (Welsh), the first, excluding the purely mythological, into the Ultonian (connected with Ulster) and the Ossianic. The Ultonianis grouped round the names of King Conchobar and the heroCuchulainn, " the Irish Achilles," the defender of Ulster against all Ireland, regarded by some as a solar hero.
The god Lug is represented as having been swallowed in a draught of wine by his mother Dechtire, sister of Conchobar, who was king of Ulster.