Cailitín Dána (Cailitin or Calatin) was the chief druid of Medb and Ailill. Cailitin was known most for his fight against the Ulster's hero, Cu Chulainn, in the Táin Bó Cuailnge.
Cailitin had many sons and several daughters, and they were all known as the Clan Cailitin. They were all described
as hideously deformed druids.
Twenty-seven sons joined Calitin, when they crossed over to Ulster with the large army of Medb. Just before the single
combat between Cu Chulainn and Fer Díad Mac Damann, Calitin and his sons fought an unfair combat against the Ulsterian hero.
Actually, 29 of them fought against Cu Chulainn, one of them was named Glas Mac Delga, who was either Cailitin's grandson
or nephew (sister's son).
The Clan Cailitin wield 29 poison-tipped spears; if you were killed outright, the victim would die from the poison
after nine days of agony. Cu Chulainn caught all 29 spears with his shield, but their superior number would have killed the
hero had not one of the exiled Ulstermen, Fiachu Mac Fir Fhebe, come to his aid. With one sword stroke, Fiachu sheared off
the right arms of Clan Cailitin. Cu Chulainn killed all the Clan Cailitin, though Glas managed to momentarily
escape back to Medb's camp. Before Glas could disclose the treachery of Fiachu, Cailitin's nephew was killed by a slingstone
of Cu Chulainn.
Despite the death of Cailitin and his 27 sons, Cailitin's other surviving children became involved with Cu Chulainn's death.
They used their magic to lure the hero away, alone again, to face Medb's army.