- Céitein
- May, Old Irish cétam (g. cétaman), cetsoman (cetshaman) in Cor.Gl., where it is explained as cét-sam-sín, the first weather-motion of sam or summer. The word means the "first of summer" - cét+sam-, the sam of samhradh, q.v. The termination is possibly influenced by other time words. See Samhuinn.
Etymological dictionary of the Gaelic language. Alexander Gairm Publications. 1982.