Where does “Fossombrone” come from?

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

Ancestry of “Fossombrone”, step by step

StepLanguageWordMeaning
1LatinForum Semproniisituated in the valley of the Metaurus, now Fossombrone
2Latinforumpublic place, marketplace, forum
3Proto-Italic*foromforum
Every word from Proto-Italic *forom →Every word from Latin forum →Every word from Latin Forum Sempronii →