Athenis
Athenis is a Latin form of Athenae, meaning “Athens”. It is the ablative plural feminine noun.
Found 268 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Civili 3.3: … ias nactus, quod vacuum a bello atque ab hoste otiosum fuerat, magnam ex Asia Cycladibusque insulis, Corcyra, Athenis, Ponto, Bithynia, Syria, Cilicia, Phoenice, Aegypto classem coëgerat, magnam omnibus locis aedificandam curav …
All forms of Athenae (declension table)
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.