Altinum

Uncertain:

• According to Alessio-De Giovanni, the name derives from a Mediterranean pre-IE substrate *alt (“swamp”)
• Comparable with Altaenus in Apulia, from a dental extension *alt- of Proto-Italic *alō, from Proto-Indo-European *h₂életi (“grow, nourish”), making it a doublet of altus (“tall, high”). This is supported by Pokorny and Frisk.
• According to Duridanov, the extension *alt- is from Proto-Indo-European *ol-to (“flooded”), from *el- (“to flow”).

Altīnum n sg (genitive Altīnī); second declension

1. a city of Venetia situated near the mouth of the river Silis, on a marshy area

Second-declension noun (neuter), with locative, singular only.

• “Altinum”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly
• Altinum in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• Pokorny, Julius, Indogermanisches Etymologisches Wörterbuch, Tübingen: A. Francke Verlag, 1959.
• G. CRESCI - M. TIRELLI, Altino romana attraverso l'obbietivo fotografico di Alessio De Bon, in Quaderni Friulani di Archeologia 26, 2016, 77-84
• Eos: commentarii Societatis Philologae Polonorum, Volumes 68-69
• "Altino," Antonio Sciarretta's Toponymy