Where does “beathaisnéiseach” come from?
beathaisnéiseach (Irish) comes from Irish beathaisnéis, from Irish beath-, from Irish beatha, from Old Irish bethu, from Proto-Celtic biwotūts, from Proto-Celtic biwos, from Proto-Indo-European gʷih₃wós, from Proto-Indo-European gʷeih₃w- — to live.
beathaisnéiseach (Irish): biographical
Ancestry of “beathaisnéiseach”, step by step