Where does “lombardo” come from?

lombardo (Italian) comes from Latin Longobardus, from Proto-Germanic langaz, from Proto-Indo-European dlongʰos — long.

lombardo (Italian): Lombard

Definitions

Step	Language	Word	Meaning
1	Latin	Longobardus	—
2	Proto-Germanic	langaz	long
3	Proto-Indo-European	dlongʰos	long

lombardo — Etymology, Origin & Word History | Etymology Explorer