Fidenas
Fidenas is a Latin form of Fidenates, meaning “a very ancient town of Latium; on the left bank of the Tiber”. It is the nominative singular masculine noun or nominative singular feminine noun.
Found 32 times in the Latin texts on Socratos.
Where it is used
Tacitus, Historiae 3.80: … m partium speculabantur. capitur praefectus alae Iulius Flavianus; ceteri foeda fuga consternantur, non ultra Fidenas secutis victoribus.
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.