Proper noun
Proto-Celtic
The putative ancestor of all the known Celtic languages.
Studia Celtica 14/15 (1979–80), pp.106–113 Professor Alan Ward derives it from the Proto-Celtic *embibolgon, "budding". Source: Internet
DIL p. 507. This can be reconstructed in Proto-Celtic as *Moro-rīganī-s. Source: Internet
In the P/Q classification schema, the first language to split off from Proto-Celtic was Gaelic. Source: Internet
Retrieved 7 January 2006 However, Breton and Cornish are Brythonic languages in which Proto-Celtic *k did undergo systematic sound changes into -gh- and -ch-. Source: Internet
The regular consonantal sound changes from Proto-Celtic to Welsh, Cornish and Breton are summarised in the following table. Source: Internet