Cormac mac Airt
In Goidelic Celtic mythology
, Cormac mac Airt
was the son of Achtan
. He may have been a historical Irish king. He ruled from Tara
, the capital of the High Kings of Ireland
for forty years, probably AD 227
The sea god Manannan Mac Lir gave him a magical gold goblet. It would break into three pieces when three lies were told over it; speaking three truths would fix it.