One of two sub-branches of the Celtic languages, also known as "Brythonic", which now consists of Welsh and Breton. Cornish, which is now extinct, was also a Brythonic language. It is commonly believed that the languages of ancient Gaul and Celtic Britain were also Brythonic, and most likely somewhat similar to modern Welsh.

The designation of "P-Celtic" arose because one original Indo-European sound manifested itself as a "p" in the Brythonic languages. An example is "four" in Welsh, "pedwar", as opposed to "ceathair" in Irish.

See also Q-Celtic.


Many thanks to Gritchka for the "four" example.

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