Where does “Fossombrone” come from?

Fossombrone (Italian) comes from Latin Forum Sempronii, from Latin forum, from Proto-Italic *forom.

Ancestry of “Fossombrone”, step by step

Step	Language	Word	Meaning
1	Latin	Forum Sempronii	—
2	Latin	forum	public place, marketplace, forum
3	Proto-Italic	*forom	—

Fossombrone — Etymology, Origin & Word History | Etymology Explorer