ljuv (Norwegian Nynorsk) comes from Old Norse ljúfr, from Proto-Norse ᛚᛖᚢᛒᚨᛉ, from Proto-Germanic leubaz, from Proto-Indo-European lewbʰ-, from Proto-Indo-European lēw- — to sound, resound, sing out; to leave.
ljuv (Norwegian Nynorsk): lovely, sweet