Where does “massa” come from?

massa (Dutch) comes from Middle Dutch masse, from Old French masse, from Latin massa, from Ancient Greek μᾶζα, from Ancient Greek μάσσω, from Proto-Indo-European mh₂ǵyéti, from Proto-Indo-European meh₂ǵ- — to knead, stroke.

massa (Dutch): mass, large amount; mass; multitude, mass, throng