Where does “bûter” come from?
bûter (West Frisian) comes from Old Frisian butere, from Proto-West Germanic buterā, from Latin būtȳrum, from Ancient Greek βούτυρον, from Ancient Greek τυρός, from Proto-Hellenic tūrós, from Proto-Indo-European tuh₂-ró-s, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.
bûter (West Frisian): butter
Ancestry of “bûter”, step by step