Where does “Fordongianus” come from?

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

Ancestry of “Fordongianus”, step by step

StepLanguageWordMeaning
1LatinForum Trajanisituated in the valley of the Thyrsus, now Fordongianus
2Latinforumpublic place, marketplace, forum
3Proto-Italic*foromforum
Every word from Proto-Italic *forom →Every word from Latin forum →Every word from Latin Forum Trajani →