What does Celtic refer to?

Celtic is the term for a subfamily of the Indo-European family of languages which is subdivided into the Brythonic branch (Welsh for example) and the Goidelic branch (Irish Gaelic). The term can also refer to the Celtic form of Christianity before the late 500s. It can refer to the artistic style used by the ancients. Although the Celts were formerly considered to be a "race", recent DNA evidence indicates the British and Irish population to have little connection with the historic Celts of central Europe and instead are traced to what is now Spain and Portugal.

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