Where does “litra” come from?

litra (Finnish) comes from Medieval Latin litra, from Ancient Greek λίτρα, from Proto-Italic *līðrā.

litra (Finnish): litre

Definitions

Step	Language	Word	Meaning
1	Medieval Latin	litra	—
2	Ancient Greek	λίτρα	litra, a Sicilian silver coin; libra, a unit of...
3	Proto-Italic	*līðrā	—

litra — Etymology, Origin & Word History | Etymology Explorer