Italian word pane comes from Proto-Indo-European *patrom, Latin -fex (Denotes maker or performer.)
*patrom (Proto-Indo-European)
-fex (Latin)
Denotes maker or performer.
panis (Latin)
(figuratively) food or nourishment in general, whether physical or spiritual. A mass in the shape of a loaf. Bread, loaf.
pane (Italian)
Block (of butter etc). Bread.