Definition - A subdivision of Celtic that includes Gaelic, Irish, and Manx.

Etymology -
The name derives from the Old Irish Goídelc, which in turn derives from the Old Welsh Guoidel, pirate or raider.

Oxford English Dictionary -
Its first citation is from 1882:
"This could only happen through the medium of men who spoke Goidelic."
(Rhys Celtic Britain 196)

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