Where does “Chwefror” come from?
Chwefror (Welsh) comes from Middle Welsh chwefrawr, from Proto-Brythonic *hwevrọr, from Latin Februārius, from Latin Fēbrua, from Latin febris, from Proto-Italic *feɣʷris, from Proto-Indo-European dʰegʷʰris, from Proto-Indo-European dʰegʷʰ- — to burn; warm, hot.
Ancestry of “Chwefror”, step by step