Veientium
Veientium is a Latin form of Veiens, meaning “of Veii; (Veientes) the people of Veii, Etruscan city”. It is the genitive plural neuter adjective or genitive plural masculine adjective or genitive plural feminine adjective.
Found 26 times in the Latin texts on Socratos.
Where it is used
Cicero, Philippicae 9.4: Lars Tolumnius, rex Veientium, quattuor legatos populi Romani Fidenis interemit, quorum statuae steterunt usque ad meam memoriam in rostris …
Livy, Ab urbe condita 1.15.1: belli Fidenatis contagione inritati Ueientium animi et consanguinitate—nam Fidenates quoque Etrusci fuerunt—et quod ipsa propinquitas loci, si Romana arma …
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.