Word Origin & History
Celt
1607, from L. Celta, singular of Celtæ, from Gk. Keltoi, Herodotus' word for the Gauls (who were also called Galatai). Used by the Romans of continental Gauls but apparently not of the British Celtic tribes. Celtic twilight is from Yeats's name for his collection of adapted Irish folk tales (1893).