Where does “*keruɨn” come from?
*keruɨn (Proto-Brythonic) comes from Vulgar Latin *cerēna, from Latin carina, from Proto-Indo-European ḱerh₂- — head, top; horn.
*keruɨn (Proto-Brythonic) comes from Vulgar Latin *cerēna, from Latin carina, from Proto-Indo-European ḱerh₂- — head, top; horn.