Where does “fagetum” come from?

fagetum (Latin) comes from Latin fāgus, from Proto-Italic fāgos, from Proto-Indo-European bʰeh₂ǵos — beech.

Ancestry of “fagetum”, step by step

Step	Language	Word	Meaning
1	Latin	fāgus	—
2	Proto-Italic	fāgos	—
3	Proto-Indo-European	bʰeh₂ǵos	beech

fagetum — Etymology, Origin & Word History | Etymology Explorer